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एक प्रमाण में \(p^2=5q^2\), फिर (p=5k), फिर \(q^2=5k^2\) मिला। यह किस संख्या की अपरिमेयता से जुड़ा है?

In a proof, \(p^2=5q^2\), then (p=5k), then \(q^2=5k^2\) are obtained. This is related to the irrationality of which number?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{5}\)

Step 1

Concept

The main factor in the equation is (5).

Step 2

Why this answer is correct

\(p^2=5q^2\) usually comes from the proof of \(\sqrt{5}\).

Step 3

Exam Tip

To identify the proof, look at the factor in the equation. चरण 1: समीकरण में मुख्य गुणनखंड (5) है। चरण 2: \(p^2=5q^2\) सामान्य रूप से \(\sqrt{5}\) के प्रमाण से आता है। चरण 3: प्रमाण पहचानने के लिए समीकरण में गुणनखंड देखें।

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चित्र विश्लेषण में पहले तत्व और फिर प्रभाव लिखना क्यों उचित है?

Why is it proper to write elements first and then effects in picture analysis?

Explanation opens after your attempt
Correct Answer

A. क्योंकि इससे अवलोकन और व्याख्या दोनों स्पष्ट होते हैंBecause observation and interpretation both become clear

Step 1

Concept

Identifying visible elements first gives base to analysis. Exam tip: use observation plus effect order.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि इससे अवलोकन और व्याख्या दोनों स्पष्ट होते हैं / Because observation and interpretation both become clear. Identifying visible elements first gives base to analysis. Exam tip: use observation plus effect order.

Step 3

Exam Tip

पहले दिखने वाले तत्व पहचानना विश्लेषण को आधार देता है। परीक्षा में observation plus effect का क्रम अपनाएं।

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यदि किसी स्थलरूप में काली मिट्टी और बेसाल्टिक आधार दोनों मिलें तो वह किस क्षेत्र से सबसे अधिक जुड़ता है?

If a landform has both black soil and a basaltic base then it is most linked with which region?

Explanation opens after your attempt
Correct Answer

A. दक्कन पठारDeccan Plateau

Step 1

Concept

The Deccan region shows a relation between basaltic lava and black soil. For exams also remember the cotton region.

Step 2

Why this answer is correct

The correct answer is A. दक्कन पठार / Deccan Plateau. The Deccan region shows a relation between basaltic lava and black soil. For exams also remember the cotton region.

Step 3

Exam Tip

दक्कन क्षेत्र में बेसाल्टिक लावा और काली मिट्टी का संबंध मिलता है। परीक्षा में कपास क्षेत्र भी याद रखें।

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यदि कोई नदी दरार घाटी से पश्चिम की ओर अरब सागर में गिरती है तो वह किसका उदाहरण है?

If a river flows west through a rift valley into the Arabian Sea then it is an example of what?

Explanation opens after your attempt
Correct Answer

B. नर्मदाNarmada

Step 1

Concept

Narmada flows westward through a rift valley into Arabian Sea. For exams remember Narmada Tapi as special west flowing rivers.

Step 2

Why this answer is correct

The correct answer is B. नर्मदा / Narmada. Narmada flows westward through a rift valley into Arabian Sea. For exams remember Narmada Tapi as special west flowing rivers.

Step 3

Exam Tip

नर्मदा दरार घाटी से पश्चिम की ओर बहकर अरब सागर में गिरती है। परीक्षा में नर्मदा तापी को विशेष पश्चिममुखी नदियां याद रखें।

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यदि किसी भूभाग में ज्वारीय खारा दलदल और मैंग्रोव मिलते हों तो वह किससे मेल खाता है?

If a land area has tidal saline marsh and mangroves then it matches which region?

Explanation opens after your attempt
Correct Answer

A. सुंदरवनSundarbans

Step 1

Concept

Sundarbans is the tidal saline mangrove area of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 2

Why this answer is correct

The correct answer is A. सुंदरवन / Sundarbans. Sundarbans is the tidal saline mangrove area of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 3

Exam Tip

सुंदरवन गंगा ब्रह्मपुत्र डेल्टा का ज्वारीय खारा मैंग्रोव क्षेत्र है। परीक्षा में इस संकेत को तुरंत पहचानें।

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यदि किसी स्थल में ज्वारीय खारा दलदल और मैंग्रोव दोनों हों तो वह किस भारतीय क्षेत्र से मेल खाता है?

If a place has both tidal saline marsh and mangroves then it matches which Indian region?

Explanation opens after your attempt
Correct Answer

A. सुंदरवनSundarbans

Step 1

Concept

Sundarbans is a mangrove area developed in a tidal saline delta. For exams identify this clue quickly.

Step 2

Why this answer is correct

The correct answer is A. सुंदरवन / Sundarbans. Sundarbans is a mangrove area developed in a tidal saline delta. For exams identify this clue quickly.

Step 3

Exam Tip

सुंदरवन ज्वारीय खारे डेल्टा में विकसित मैंग्रोव क्षेत्र है। परीक्षा में यह संकेत तुरंत पहचानें।

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यदि किसी स्थलरूप में ज्वारीय खारा दलदल और मैंग्रोव दोनों मिलें तो उसे किससे जोड़ा जाएगा?

If a landform has both tidal saline marsh and mangroves then it will be linked with what?

Explanation opens after your attempt
Correct Answer

B. सुंदरवनSundarbans

Step 1

Concept

Sundarbans is the tidal saline mangrove region of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 2

Why this answer is correct

The correct answer is B. सुंदरवन / Sundarbans. Sundarbans is the tidal saline mangrove region of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 3

Exam Tip

सुंदरवन गंगा ब्रह्मपुत्र डेल्टा का ज्वारीय खारा मैंग्रोव क्षेत्र है। परीक्षा में यह संकेत तुरंत पहचानें।

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यदि किसी तट पर गोदावरी और कृष्णा जैसे डेल्टा मिलें तो वह किस तट की पहचान कराता है?

If deltas like Godavari and Krishna are found on a coast then which coast does it identify?

Explanation opens after your attempt
Correct Answer

C. पूर्वी तटEastern coast

Step 1

Concept

Godavari and Krishna are east flowing rivers that form deltas on the eastern coast. For exams remember Bay of Bengal.

Step 2

Why this answer is correct

The correct answer is C. पूर्वी तट / Eastern coast. Godavari and Krishna are east flowing rivers that form deltas on the eastern coast. For exams remember Bay of Bengal.

Step 3

Exam Tip

गोदावरी और कृष्णा पूर्वमुखी नदियां हैं जो पूर्वी तट पर डेल्टा बनाती हैं। परीक्षा में बंगाल की खाड़ी याद रखें।

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यदि किसी क्षेत्र में कंकड़ वाली छिद्रदार तलहटी पट्टी हो तो वह किससे सबसे अधिक मेल खाएगा?

If an area has a pebbly porous foothill belt then it will best match what?

Explanation opens after your attempt
Correct Answer

A. भाबरBhabar

Step 1

Concept

Bhabar is a pebbly and gravelly porous belt in the Himalayan foothills. For exams keep it separate from Terai.

Step 2

Why this answer is correct

The correct answer is A. भाबर / Bhabar. Bhabar is a pebbly and gravelly porous belt in the Himalayan foothills. For exams keep it separate from Terai.

Step 3

Exam Tip

भाबर हिमालय की तलहटी में कंकड़ और बजरी वाली छिद्रदार पट्टी है। परीक्षा में इसे तराई से अलग रखें।

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यदि किसी तटीय भाग पर बड़े नदी डेल्टा बहुत विकसित हैं तो वह किस तट से सबसे अधिक संबंधित होगा?

If large river deltas are highly developed on a coastal part then it is most related to which coast?

Explanation opens after your attempt
Correct Answer

A. पूर्वी तटEastern coast

Step 1

Concept

Large deltas of east flowing rivers develop on the eastern coast. For exams remember Bay of Bengal and deltas.

Step 2

Why this answer is correct

The correct answer is A. पूर्वी तट / Eastern coast. Large deltas of east flowing rivers develop on the eastern coast. For exams remember Bay of Bengal and deltas.

Step 3

Exam Tip

पूर्वी तट पर पूर्वमुखी नदियों के बड़े डेल्टा विकसित होते हैं। परीक्षा में बंगाल की खाड़ी और डेल्टा याद रखें।

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यदि कोई पर्वतमाला अत्यंत पुरानी और बहुत अधिक अपक्षयित है तो भारत में उसका सर्वोत्तम उदाहरण कौन सा है?

If a mountain range is very ancient and highly eroded then which is the best example in India?

Explanation opens after your attempt
Correct Answer

A. अरावलीAravalli

Step 1

Concept

Aravalli is among India's very ancient and eroded mountain ranges. For exams remember the difference between Aravalli and Himalaya.

Step 2

Why this answer is correct

The correct answer is A. अरावली / Aravalli. Aravalli is among India's very ancient and eroded mountain ranges. For exams remember the difference between Aravalli and Himalaya.

Step 3

Exam Tip

अरावली भारत की बहुत प्राचीन और घिसी हुई पर्वतमालाओं में शामिल है। परीक्षा में अरावली और हिमालय का अंतर याद रखें।

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यदि किसी नदी का मार्ग भ्रंशित दरार घाटी से होकर अरब सागर की ओर है तो वह किस उदाहरण से मेल खाता है?

If a river course passes through a faulted rift valley toward the Arabian Sea then it matches which example?

Explanation opens after your attempt
Correct Answer

A. नर्मदाNarmada

Step 1

Concept

Narmada flows west through a rift valley into the Arabian Sea. For exams remember the special course of Narmada.

Step 2

Why this answer is correct

The correct answer is A. नर्मदा / Narmada. Narmada flows west through a rift valley into the Arabian Sea. For exams remember the special course of Narmada.

Step 3

Exam Tip

नर्मदा पश्चिम की ओर दरार घाटी से बहकर अरब सागर में गिरती है। परीक्षा में नर्मदा मार्ग की विशेषता याद रखें।

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यदि कोई क्षेत्र ज्वारीय डेल्टा और मैंग्रोव दोनों दिखाता है तो वह किस भारतीय क्षेत्र से सबसे अधिक मेल खाता है?

If an area shows both tidal delta and mangroves then it best matches which Indian region?

Explanation opens after your attempt
Correct Answer

A. सुंदरवनSundarbans

Step 1

Concept

Sundarbans is the tidal mangrove region of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 2

Why this answer is correct

The correct answer is A. सुंदरवन / Sundarbans. Sundarbans is the tidal mangrove region of the Ganga Brahmaputra Delta. For exams identify this clue quickly.

Step 3

Exam Tip

सुंदरवन गंगा ब्रह्मपुत्र डेल्टा का ज्वारीय मैंग्रोव क्षेत्र है। परीक्षा में यह संकेत तुरंत पहचानें।

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एक ऐप पर (14) दिनों में कुल (2590) डाउनलोड हुए। यदि हर दिन डाउनलोड (12) से बढ़े तो पहले दिन कितने डाउनलोड हुए?

An app gets (2590) downloads in (14) days. If downloads increase by (12) each day then how many downloads happened on the first day?

Explanation opens after your attempt
Correct Answer

C. (107)

Step 1

Concept

Using \(S_{14}=2590\) and (d=12) gives (a=107). Exam tip: find the first day from total and increase.

Step 2

Why this answer is correct

The correct answer is C. (107). Using \(S_{14}=2590\) and (d=12) gives (a=107). Exam tip: find the first day from total and increase.

Step 3

Exam Tip

\(S_{14}=2590\) और (d=12) रखने पर (a=107) मिलता है। परीक्षा में कुल और वृद्धि से पहला दिन निकालें।

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एक दुकान में (16) सप्ताहों की कुल बिक्री (1320) वस्तुएं है। यदि पहले सप्ताह (45) वस्तुएं बिकीं तो साप्ताहिक वृद्धि कितनी है?

A shop sells (1320) items in (16) weeks. If (45) items are sold in the first week then what is the weekly increase?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

Using \(S_{16}=1320\) and (a=45) gives (d=5). Exam tip: find the common difference from total and first term.

Step 2

Why this answer is correct

The correct answer is C. (5). Using \(S_{16}=1320\) and (a=45) gives (d=5). Exam tip: find the common difference from total and first term.

Step 3

Exam Tip

\(S_{16}=1320\) और (a=45) रखने पर (d=5) मिलता है। परीक्षा में कुल और प्रथम पद से सार्व अंतर निकालें।

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यदि किसी समान्तर श्रेणी का \(S_n=3n^2+2n\) है तो पहले (15) पदों का योग कितना है?

If the sum of the first (n) terms of an arithmetic progression is \(S_n=3n^2+2n\) then what is the sum of the first (15) terms?

Explanation opens after your attempt
Correct Answer

A. (705)

Step 1

Concept

Substituting (n=15) gives (S_{15}=3(15)2+2(15)=705). Exam tip: when \(S_n\) is given directly, substitute (n) first.

Step 2

Why this answer is correct

The correct answer is A. (705). Substituting (n=15) gives (S_{15}=3(15)2+2(15)=705). Exam tip: when \(S_n\) is given directly, substitute (n) first.

Step 3

Exam Tip

दिए गए सूत्र में (n=15) रखने पर (S_{15}=3(15)2+2(15)=705)। परीक्षा में दिए गए \(S_n\) में सीधे (n) रखें।

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अनुक्रम \(6, 10, 14, 18,\ldots\) के प्रत्येक पद को (3) से गुणा करके (2) घटाया जाए, तो नए अनुक्रम का (d) क्या होगा?

If each term of \(6, 10, 14, 18,\ldots\) is multiplied by (3) and then (2) is subtracted, what will be (d) of the new sequence?

Explanation opens after your attempt
Correct Answer

B. (12)

Step 1

Concept

The original (d=4); multiplying by (3) makes (d=12), and subtracting the same (2) does not change (d). Equal addition or subtraction does not change (d).

Step 2

Why this answer is correct

The correct answer is B. (12). The original (d=4); multiplying by (3) makes (d=12), and subtracting the same (2) does not change (d). Equal addition or subtraction does not change (d).

Step 3

Exam Tip

मूल (d=4) है, गुणा (3) करने से (d=12) होगा और समान (2) घटाने से (d) नहीं बदलेगा। समान जोड़-घटाव (d) को नहीं बदलता।

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यदि \(1, 4, 7,\ldots\) के प्रत्येक पद का दुगुना लेकर फिर (1) घटाया जाए, तो नए अनुक्रम का सार्व अंतर क्या होगा?

If twice each term of \(1, 4, 7,\ldots\) is taken and then (1) is subtracted, what will be the common difference of the new sequence?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The original (d=3); doubling makes (d=6), and subtracting (1) does not change (d). Multiplication changes (d), equal subtraction does not.

Step 2

Why this answer is correct

The correct answer is C. (6). The original (d=3); doubling makes (d=6), and subtracting (1) does not change (d). Multiplication changes (d), equal subtraction does not.

Step 3

Exam Tip

मूल (d=3) है, दुगुना करने से (d=6) होगा और (1) घटाने से (d) नहीं बदलेगा। गुणा (d) बदलता है, समान घटाव नहीं।

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यदि (lx+11y=44) और (10x+22y=91) का कोई हल नहीं है तो (l) का मान क्या होगा?

If (lx+11y=44) and (10x+22y=91) have no solution then what will be the value of (l)?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

For no solution (l/10=11/22) and (44/91) must be different. Hence (l=5).

Step 2

Why this answer is correct

The correct answer is C. (5). For no solution (l/10=11/22) and (44/91) must be different. Hence (l=5).

Step 3

Exam Tip

कोई हल नहीं के लिए (l/10=11/22) और (44/91) अलग होना चाहिए। इसलिए (l=5)।

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यदि (10x-5y=30) और (2x-y=t) असंगत हैं तो (t) के लिए सही शर्त क्या है?

If (10x-5y=30) and (2x-y=t) are inconsistent then what is the correct condition for (t)?

Explanation opens after your attempt
Correct Answer

B. \(t \ne 6\)

Step 1

Concept

The first two ratios are equal so (30/t) must be different for inconsistency. Hence \(t \ne 6\).

Step 2

Why this answer is correct

The correct answer is B. \(t \ne 6\). The first two ratios are equal so (30/t) must be different for inconsistency. Hence \(t \ne 6\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं इसलिए असंगत होने के लिए (30/t) अलग होना चाहिए। अतः \(t \ne 6\)।

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यदि (7x+4y=37) और (21x+12y=n) के अनंत हल हैं तो (n) कितना होगा?

If (7x+4y=37) and (21x+12y=n) have infinitely many solutions then what is (n)?

Explanation opens after your attempt
Correct Answer

C. (111)

Step 1

Concept

The second equation must be (3) times the first. Therefore (n=111).

Step 2

Why this answer is correct

The correct answer is C. (111). The second equation must be (3) times the first. Therefore (n=111).

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना होना चाहिए। इसलिए (n=111) होगा।

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यदि (ax+9y=27) और (14x+21y=64) का कोई हल नहीं है तो (a) क्या होगा?

If (ax+9y=27) and (14x+21y=64) have no solution then what will (a) be?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

For no solution (a/14=9/21) and (27/64) must be different. Therefore (a=6).

Step 2

Why this answer is correct

The correct answer is C. (6). For no solution (a/14=9/21) and (27/64) must be different. Therefore (a=6).

Step 3

Exam Tip

कोई हल नहीं के लिए (a/14=9/21) और (27/64) अलग होना चाहिए। इसलिए (a=6)।

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यदि \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) हो तो ग्राफ में कौन-सी स्थिति बनेगी?

If \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) then which situation will occur in the graph?

Explanation opens after your attempt
Correct Answer

C. अलग समानांतर रेखाएंDistinct parallel lines

Step 1

Concept

If the first two ratios are equal and the third differs the lines are parallel and distinct. Therefore no common solution is obtained.

Step 2

Why this answer is correct

The correct answer is C. अलग समानांतर रेखाएं / Distinct parallel lines. If the first two ratios are equal and the third differs the lines are parallel and distinct. Therefore no common solution is obtained.

Step 3

Exam Tip

पहले दो अनुपात बराबर और तीसरा अलग हो तो रेखाएं समानांतर और अलग होती हैं। इसलिए कोई सामान्य हल नहीं मिलता।

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यदि \(a_1/a_2=b_1/b_2=c_1/c_2\) हो तो समीकरणों के युग्म की प्रकृति क्या होगी?

If \(a_1/a_2=b_1/b_2=c_1/c_2\) then what will be the nature of the pair of equations?

Explanation opens after your attempt
Correct Answer

C. संगत और आश्रितConsistent and dependent

Step 1

Concept

If all three ratios are equal both equations represent the same line. Such a pair is consistent and dependent.

Step 2

Why this answer is correct

The correct answer is C. संगत और आश्रित / Consistent and dependent. If all three ratios are equal both equations represent the same line. Such a pair is consistent and dependent.

Step 3

Exam Tip

तीनों अनुपात बराबर हों तो दोनों समीकरण एक ही रेखा दर्शाते हैं। ऐसा युग्म संगत और आश्रित होता है।

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यदि (5x+2y=13) और (10x+4y=m) असंगत युग्म हैं तो (m) के लिए सही शर्त क्या है?

If (5x+2y=13) and (10x+4y=m) form an inconsistent pair then what is the correct condition for (m)?

Explanation opens after your attempt
Correct Answer

C. \(m \ne 26\)

Step 1

Concept

The first two ratios are equal so the constant ratio must differ for inconsistency. Hence \(m \ne 26\).

Step 2

Why this answer is correct

The correct answer is C. \(m \ne 26\). The first two ratios are equal so the constant ratio must differ for inconsistency. Hence \(m \ne 26\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं इसलिए असंगत होने के लिए स्थिर पद का अनुपात अलग होना चाहिए। अतः \(m \ne 26\)।

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यदि (2) समीकरणों में \(a_1/a_2=b_1/b_2\) हो लेकिन \(c_1/c_2\) अलग हो तो क्या होगा?

If (2) equations have \(a_1/a_2=b_1/b_2\) but \(c_1/c_2\) is different then what happens?

Explanation opens after your attempt
Correct Answer

C. रेखाएं अलग समानांतर होती हैंLines are distinct parallel

Step 1

Concept

When the first two ratios are equal and the third is different the lines remain parallel. Therefore there is no solution.

Step 2

Why this answer is correct

The correct answer is C. रेखाएं अलग समानांतर होती हैं / Lines are distinct parallel. When the first two ratios are equal and the third is different the lines remain parallel. Therefore there is no solution.

Step 3

Exam Tip

पहले दो अनुपात बराबर और तीसरा अलग हो तो रेखाएं समानांतर रहती हैं। इसलिए कोई हल नहीं होता।

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यदि (2) समीकरणों में \(a_1/a_2=b_1/b_2\) हो और \(c_1/c_2\) भी वही हो तो क्या होगा?

If (2) equations have \(a_1/a_2=b_1/b_2\) and \(c_1/c_2\) is also the same then what happens?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

When all three ratios are equal the equations make the same line. Therefore the solutions are infinite.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. When all three ratios are equal the equations make the same line. Therefore the solutions are infinite.

Step 3

Exam Tip

तीनों अनुपात बराबर होने पर समीकरण समान रेखा बनाते हैं। इसलिए हल अनंत होते हैं।

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यदि दो रेखाओं की ढाल और अवरोध दोनों समान हों तो रेखाएं कैसी होंगी?

If two lines have the same slope and the same intercept then what kind of lines will they be?

Explanation opens after your attempt
Correct Answer

C. संपातीCoincident

Step 1

Concept

Same slope and same intercept mean both lines are the same. Therefore they have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. संपाती / Coincident. Same slope and same intercept mean both lines are the same. Therefore they have infinitely many solutions.

Step 3

Exam Tip

समान ढाल और समान अवरोध का मतलब दोनों रेखाएं एक ही हैं। इसलिए उनके अनंत हल होते हैं।

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यदि दो रेखाओं की ढाल अलग हो तो युग्म के बारे में सही कथन कौन-सा है?

If two lines have different slopes then which statement about the pair is correct?

Explanation opens after your attempt
Correct Answer

B. युग्म संगत और स्वतंत्र हैThe pair is consistent and independent

Step 1

Concept

Lines with different slopes meet at one point. Therefore the pair has one unique solution.

Step 2

Why this answer is correct

The correct answer is B. युग्म संगत और स्वतंत्र है / The pair is consistent and independent. Lines with different slopes meet at one point. Therefore the pair has one unique solution.

Step 3

Exam Tip

अलग ढाल वाली रेखाएं एक बिंदु पर मिलती हैं। इसलिए युग्म में एक अद्वितीय हल होता है।

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ग्राफ में यदि दोनों समीकरण एक ही रेखा दें तो युग्म में कितने हल होंगे?

If both equations give the same line in a graph then how many solutions will the pair have?

Explanation opens after your attempt
Correct Answer

D. अनंत हलInfinitely many solutions

Step 1

Concept

Every point on the same line satisfies both equations. Therefore such a pair has infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is D. अनंत हल / Infinitely many solutions. Every point on the same line satisfies both equations. Therefore such a pair has infinitely many solutions.

Step 3

Exam Tip

एक ही रेखा के हर बिंदु से दोनों समीकरण संतुष्ट होते हैं। इसलिए ऐसे युग्म में अनंत हल होते हैं।

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ग्राफ में यदि दो रेखाएं केवल एक बिंदु पर कटें तो हल-प्रकार क्या है?

If two lines intersect at exactly one point in a graph then what is the solution type?

Explanation opens after your attempt
Correct Answer

B. एक अद्वितीय हलOne unique solution

Step 1

Concept

One intersection point is the common solution of both equations. Therefore exactly one unique solution is obtained.

Step 2

Why this answer is correct

The correct answer is B. एक अद्वितीय हल / One unique solution. One intersection point is the common solution of both equations. Therefore exactly one unique solution is obtained.

Step 3

Exam Tip

कटने का एक बिंदु दोनों समीकरणों का सामान्य हल होता है। इसलिए केवल एक अद्वितीय हल मिलता है।

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ग्राफ में यदि दो रेखाएं अलग-अलग समानांतर दिखती हैं तो युग्म कैसा कहलाता है?

If two lines appear distinct and parallel in a graph then what is the pair called?

Explanation opens after your attempt
Correct Answer

D. असंगतInconsistent

Step 1

Concept

Distinct parallel lines have no common point. Therefore the pair is called inconsistent.

Step 2

Why this answer is correct

The correct answer is D. असंगत / Inconsistent. Distinct parallel lines have no common point. Therefore the pair is called inconsistent.

Step 3

Exam Tip

अलग समानांतर रेखाओं का कोई सामान्य बिंदु नहीं होता। इसलिए युग्म असंगत कहलाता है।

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यदि \(a_1/a_2=b_1/b_2=c_1/c_2\) हो तो ग्राफ में क्या दिखाई देगा?

If \(a_1/a_2=b_1/b_2=c_1/c_2\) then what will appear in the graph?

Explanation opens after your attempt
Correct Answer

C. एक ही रेखाSame line

Step 1

Concept

When all three ratios are equal both equations make the same line. This situation has infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. एक ही रेखा / Same line. When all three ratios are equal both equations make the same line. This situation has infinitely many solutions.

Step 3

Exam Tip

तीनों अनुपात बराबर होने पर दोनों समीकरण एक ही रेखा बनाते हैं। ऐसी स्थिति में अनंत हल होते हैं।

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यदि \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) हो तो कितने हल होंगे?

If \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) then how many solutions will there be?

Explanation opens after your attempt
Correct Answer

C. कोई हल नहींNo solution

Step 1

Concept

In this case the lines are parallel and distinct. Distinct parallel lines never meet.

Step 2

Why this answer is correct

The correct answer is C. कोई हल नहीं / No solution. In this case the lines are parallel and distinct. Distinct parallel lines never meet.

Step 3

Exam Tip

इस स्थिति में रेखाएं समानांतर और अलग होती हैं। समानांतर अलग रेखाएं कभी नहीं मिलतीं।

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यदि \(a_1/a_2 \ne b_1/b_2\) हो तो रेखाओं की स्थिति क्या होगी?

If \(a_1/a_2 \ne b_1/b_2\) then what will be the position of the lines?

Explanation opens after your attempt
Correct Answer

B. कटती हुईIntersecting

Step 1

Concept

Different ratios show that the lines are not parallel. Therefore they intersect at one point.

Step 2

Why this answer is correct

The correct answer is B. कटती हुई / Intersecting. Different ratios show that the lines are not parallel. Therefore they intersect at one point.

Step 3

Exam Tip

अलग अनुपात बताता है कि रेखाएं समानांतर नहीं हैं। इसलिए वे एक बिंदु पर कटती हैं।

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यदि दो रेखाओं की ढाल अलग-अलग हो तो युग्म में कितने हल होंगे?

If two lines have different slopes then how many solutions will the pair have?

Explanation opens after your attempt
Correct Answer

C. एक अद्वितीय हलOne unique solution

Step 1

Concept

Lines with different slopes meet at exactly one point. Therefore the pair is consistent and independent.

Step 2

Why this answer is correct

The correct answer is C. एक अद्वितीय हल / One unique solution. Lines with different slopes meet at exactly one point. Therefore the pair is consistent and independent.

Step 3

Exam Tip

अलग ढाल वाली रेखाएं एक ही बिंदु पर मिलती हैं। इसलिए युग्म संगत और स्वतंत्र होता है।

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यदि दो रेखाओं की ढाल समान लेकिन अवरोध अलग हो तो युग्म कैसा होगा?

If two lines have the same slope but different intercepts then what type of pair will it be?

Explanation opens after your attempt
Correct Answer

B. असंगतInconsistent

Step 1

Concept

Same slope and different intercepts make the lines parallel and distinct. Therefore there is no common solution.

Step 2

Why this answer is correct

The correct answer is B. असंगत / Inconsistent. Same slope and different intercepts make the lines parallel and distinct. Therefore there is no common solution.

Step 3

Exam Tip

समान ढाल और अलग अवरोध से रेखाएं समानांतर और अलग होती हैं। इसलिए कोई सामान्य हल नहीं होता।

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यदि दो रेखाओं की ढाल समान और अवरोध समान हो तो हलों की संख्या क्या होगी?

If two lines have the same slope and the same intercept then how many solutions will there be?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

Same slope and same intercept make both lines identical. Therefore infinitely many solutions are obtained.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. Same slope and same intercept make both lines identical. Therefore infinitely many solutions are obtained.

Step 3

Exam Tip

समान ढाल और समान अवरोध से दोनों रेखाएं एक ही हो जाती हैं। इसलिए अनंत हल मिलते हैं।

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यदि दो समीकरणों का एक ही सामान्य हल है तो रेखाएं कैसी होंगी?

If two equations have exactly one common solution then how will the lines be?

Explanation opens after your attempt
Correct Answer

C. कटती हुईIntersecting

Step 1

Concept

One common solution means one intersection of the lines. Therefore the lines will be intersecting.

Step 2

Why this answer is correct

The correct answer is C. कटती हुई / Intersecting. One common solution means one intersection of the lines. Therefore the lines will be intersecting.

Step 3

Exam Tip

एक सामान्य हल का मतलब रेखाओं का एक intersection है। इसलिए रेखाएं कटती हुई होंगी।

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यदि दो समीकरणों के अनंत सामान्य हल हैं तो उनका ग्राफ कैसा होगा?

If two equations have infinitely many common solutions then how will their graph be?

Explanation opens after your attempt
Correct Answer

B. एक ही रेखाSame line

Step 1

Concept

Infinitely many common solutions occur only when both equations represent the same line. In exams this can be written as coincident lines.

Step 2

Why this answer is correct

The correct answer is B. एक ही रेखा / Same line. Infinitely many common solutions occur only when both equations represent the same line. In exams this can be written as coincident lines.

Step 3

Exam Tip

अनंत सामान्य हल तभी मिलते हैं जब दोनों समीकरण एक ही रेखा दर्शाते हैं। परीक्षा में इसे coincident lines लिख सकते हैं।

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यदि दो समीकरणों का कोई सामान्य हल नहीं है तो वे किस प्रकार के युग्म हैं?

If two equations have no common solution then what type of pair are they?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

Having no common solution identifies an inconsistent pair. In a graph it appears as distinct parallel lines.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. Having no common solution identifies an inconsistent pair. In a graph it appears as distinct parallel lines.

Step 3

Exam Tip

कोई सामान्य हल न होना असंगत युग्म की पहचान है। ग्राफ में यह अलग समानांतर रेखाओं जैसा दिखता है।

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ग्राफ में यदि दो रेखाएं केवल एक बिंदु पर मिलें तो युग्म कैसा है?

If two lines meet only at one point in a graph then what type of pair is it?

Explanation opens after your attempt
Correct Answer

A. संगत और स्वतंत्रConsistent and independent

Step 1

Concept

One common point gives one unique solution. Therefore it is a consistent and independent pair.

Step 2

Why this answer is correct

The correct answer is A. संगत और स्वतंत्र / Consistent and independent. One common point gives one unique solution. Therefore it is a consistent and independent pair.

Step 3

Exam Tip

एक सामान्य बिंदु होने से एक अद्वितीय हल मिलता है। इसलिए यह संगत और स्वतंत्र युग्म है।

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ग्राफ में यदि दो रेखाएं पूरी तरह एक-दूसरे पर आ जाएं तो युग्म के हल कैसे होंगे?

If two lines completely overlap each other in a graph then what will be the solutions of the pair?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

Completely overlapping lines are coincident. Every point on them satisfies both equations.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. Completely overlapping lines are coincident. Every point on them satisfies both equations.

Step 3

Exam Tip

पूरी तरह मिलने वाली रेखाएं संपाती होती हैं। उनके प्रत्येक बिंदु से दोनों समीकरण संतुष्ट होते हैं।

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ग्राफ में यदि दो रेखाएं कभी नहीं मिलतीं तो समीकरणों के युग्म में कितने हल होते हैं?

If two lines never meet in a graph then how many solutions does the pair of equations have?

Explanation opens after your attempt
Correct Answer

B. कोई हल नहींNo solution

Step 1

Concept

Lines that never meet are parallel so there is no common point. No common point means no solution.

Step 2

Why this answer is correct

The correct answer is B. कोई हल नहीं / No solution. Lines that never meet are parallel so there is no common point. No common point means no solution.

Step 3

Exam Tip

न मिलने वाली रेखाएं समानांतर होती हैं इसलिए कोई सामान्य बिंदु नहीं होता। सामान्य बिंदु न होने का अर्थ कोई हल नहीं है।

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यदि \(a_1/a_2 \ne b_1/b_2\) हो तो कौन-सा निष्कर्ष सही है?

If \(a_1/a_2 \ne b_1/b_2\) then which conclusion is correct?

Explanation opens after your attempt
Correct Answer

C. एक अद्वितीय हलOne unique solution

Step 1

Concept

When the ratios of (a) and (b) are different the lines intersect. Intersecting lines give exactly one common point.

Step 2

Why this answer is correct

The correct answer is C. एक अद्वितीय हल / One unique solution. When the ratios of (a) and (b) are different the lines intersect. Intersecting lines give exactly one common point.

Step 3

Exam Tip

जब (a) और (b) के अनुपात अलग होते हैं तो रेखाएं कटती हैं। कटती रेखाएं एक ही सामान्य बिंदु देती हैं।

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यदि \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) हो तो ग्राफ में रेखाएं कैसी होंगी?

If \(a_1/a_2=b_1/b_2 \ne c_1/c_2\) then how will the lines be in the graph?

Explanation opens after your attempt
Correct Answer

B. समानांतर और अलगParallel and distinct

Step 1

Concept

Equal first two ratios give the same slope and a different third ratio keeps the lines separate. Such lines have no solution.

Step 2

Why this answer is correct

The correct answer is B. समानांतर और अलग / Parallel and distinct. Equal first two ratios give the same slope and a different third ratio keeps the lines separate. Such lines have no solution.

Step 3

Exam Tip

पहले दो अनुपात बराबर होने से ढाल समान होती है और तीसरा अलग होने से रेखाएं अलग रहती हैं। ऐसी रेखाओं का कोई हल नहीं होता।

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यदि \(a_1/a_2=b_1/b_2=c_1/c_2\) हो तो समीकरणों का युग्म कैसा कहलाता है?

If \(a_1/a_2=b_1/b_2=c_1/c_2\) then what is the pair of equations called?

Explanation opens after your attempt
Correct Answer

A. संगत और आश्रितConsistent and dependent

Step 1

Concept

When all three ratios are equal both equations give the same line. This is called a consistent and dependent pair.

Step 2

Why this answer is correct

The correct answer is A. संगत और आश्रित / Consistent and dependent. When all three ratios are equal both equations give the same line. This is called a consistent and dependent pair.

Step 3

Exam Tip

तीनों अनुपात बराबर होने पर दोनों समीकरण एक ही रेखा देते हैं। इसे संगत और आश्रित युग्म कहते हैं।

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यदि \( \sqrt{x}=4.7 \), तो (x) संख्या रेखा पर किस मान से संबंधित है?

If \( \sqrt{x}=4.7 \), then (x) corresponds to which value on the number line?

Explanation opens after your attempt
Correct Answer

C. (22.09)

Step 1

Concept

\(x=4.7^2=22.09\). Square both sides to remove the square root.

Step 2

Why this answer is correct

The correct answer is C. (22.09). \(x=4.7^2=22.09\). Square both sides to remove the square root.

Step 3

Exam Tip

\(x=4.7^2=22.09\) है। वर्गमूल हटाने के लिए दोनों पक्षों का वर्ग करें।

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यदि \(a=\sqrt{75}\), तो (a-8) संख्या रेखा पर किसके सबसे निकट है?

If \(a=\sqrt{75}\), then (a-8) is closest to which value on the number line?

Explanation opens after your attempt
Correct Answer

B. (0.66)

Step 1

Concept

\( \sqrt{75}\approx8.66 \), so \(a-8\approx0.66\). First estimate the root and then subtract.

Step 2

Why this answer is correct

The correct answer is B. (0.66). \( \sqrt{75}\approx8.66 \), so \(a-8\approx0.66\). First estimate the root and then subtract.

Step 3

Exam Tip

\( \sqrt{75}\approx8.66 \), इसलिए \(a-8\approx0.66\)। पहले मूल का अनुमान लगाएँ फिर घटाएँ।

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यदि (a) संख्या रेखा पर \( \sqrt{50} \) है, तो (a-7) किसके सबसे निकट है?

If (a) is \( \sqrt{50} \) on the number line, then (a-7) is closest to which value?

Explanation opens after your attempt
Correct Answer

A. (0.07)

Step 1

Concept

\( \sqrt{50}\approx7.071\), so \(a-7\approx0.071\). First estimate the root, then subtract.

Step 2

Why this answer is correct

The correct answer is A. (0.07). \( \sqrt{50}\approx7.071\), so \(a-7\approx0.071\). First estimate the root, then subtract.

Step 3

Exam Tip

\( \sqrt{50}\approx7.071\), इसलिए \(a-7\approx0.071\)। पहले मूल का अनुमान लगाएँ, फिर घटाएँ।

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यदि \(\frac{p}{q}\) को संख्या रेखा पर (q) बराबर भागों से दर्शाया जाता है, तो \(\frac{9}{7}\) के लिए (1) से आगे कौन-सा बिंदु चुना जाएगा?

If \(\frac{p}{q}\) is represented on the number line by (q) equal parts, then for \(\frac{9}{7}\), which point after (1) is chosen?

Explanation opens after your attempt
Correct Answer

A. \(1+\frac{2}{7}\)

Step 1

Concept

\(\frac{9}{7}=1+\frac{2}{7}\), so choose the second seventh part after (1). Converting an improper fraction into a mixed form is useful.

Step 2

Why this answer is correct

The correct answer is A. \(1+\frac{2}{7}\). \(\frac{9}{7}=1+\frac{2}{7}\), so choose the second seventh part after (1). Converting an improper fraction into a mixed form is useful.

Step 3

Exam Tip

\(\frac{9}{7}=1+\frac{2}{7}\), इसलिए (1) के बाद दूसरा सातवाँ भाग चुनेंगे। अपूर्णांक को मिश्र संख्या में बदलना उपयोगी है।

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यदि संख्या रेखा पर (0) से दाईं ओर (2.25) इकाई और फिर बाईं ओर (0.5) इकाई चला जाए तो अंतिम बिंदु क्या होगा?

If we move (2.25) units right from (0) and then (0.5) unit left on the number line, what will be the final point?

Explanation opens after your attempt
Correct Answer

B. (1.75)

Step 1

Concept

The final point is (0+2.25-0.5=1.75). Add for right movement and subtract for left movement.

Step 2

Why this answer is correct

The correct answer is B. (1.75). The final point is (0+2.25-0.5=1.75). Add for right movement and subtract for left movement.

Step 3

Exam Tip

अंतिम बिंदु (0+2.25-0.5=1.75) है। दाईं ओर जोड़ें और बाईं ओर घटाएं।

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यदि \(z=5-2\sqrt{6}\), तो (z) को किस वर्ग के रूप में लिखा जा सकता है?

If \(z=5-2\sqrt{6}\), then (z) can be written as which square?

Explanation opens after your attempt
Correct Answer

A. \((\sqrt{3}-\sqrt{2})^{2}\)

Step 1

Concept

(\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6}). In exams, identify (a,b) from (a+b) and \(2\sqrt{ab}\).

Step 2

Why this answer is correct

The correct answer is A. \((\sqrt{3}-\sqrt{2})^{2}\). (\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6}). In exams, identify (a,b) from (a+b) and \(2\sqrt{ab}\).

Step 3

Exam Tip

(\(\sqrt{3}-\sqrt{2}\)^{2}=3+2-2\sqrt{6}=5-2\sqrt{6})। परीक्षा में (a+b) और \(2\sqrt{ab}\) से (a,b) पहचानें।

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यदि \(\sqrt{x}=x^{\frac{1}{2}}\) और (x>0), तो \(\sqrt{x^{3}}\cdot x^{-\frac{1}{2}}\) किसके बराबर है?

If \(\sqrt{x}=x^{\frac{1}{2}}\) and (x>0), then \(\sqrt{x^{3}}\cdot x^{-\frac{1}{2}}\) equals which expression?

Explanation opens after your attempt
Correct Answer

A. (x)

Step 1

Concept

Since \(\sqrt{x^{3}}=x^{\frac{3}{2}}\), \(x^{\frac{3}{2}}\cdot x^{-\frac{1}{2}}=x^{1}=x\). In exams, convert radicals to fractional exponents.

Step 2

Why this answer is correct

The correct answer is A. (x). Since \(\sqrt{x^{3}}=x^{\frac{3}{2}}\), \(x^{\frac{3}{2}}\cdot x^{-\frac{1}{2}}=x^{1}=x\). In exams, convert radicals to fractional exponents.

Step 3

Exam Tip

\(\sqrt{x^{3}}=x^{\frac{3}{2}}\), इसलिए \(x^{\frac{3}{2}}\cdot x^{-\frac{1}{2}}=x^{1}=x\)। परीक्षा में मूल को भिन्न घात में बदलें।

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यदि \(x=\sqrt{5}+2\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=\sqrt{5}+2\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}-2\)

Step 1

Concept

Rationalizing gives \(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\). In exams, use the conjugate of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{5}-2\). Rationalizing gives \(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\). In exams, use the conjugate of the denominator.

Step 3

Exam Tip

\(\frac{1}{\sqrt{5}+2}\cdot\frac{\sqrt{5}-2}{\sqrt{5}-2}=\frac{\sqrt{5}-2}{5-4}=\sqrt{5}-2\)। परीक्षा में हर के संयुग्म का प्रयोग करें।

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यदि \(x=2^{3}\cdot3^{-2}\), तो \(x^{-1}\) किसके बराबर होगा?

If \(x=2^{3}\cdot3^{-2}\), then \(x^{-1}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(\frac{9}{8}\)

Step 1

Concept

Here \(x=\frac{8}{9}\), so \(x^{-1}=\frac{9}{8}\). In exams, apply \(a^{-n}=\frac{1}{a^{n}}\) in the correct direction.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{9}{8}\). Here \(x=\frac{8}{9}\), so \(x^{-1}=\frac{9}{8}\). In exams, apply \(a^{-n}=\frac{1}{a^{n}}\) in the correct direction.

Step 3

Exam Tip

\(x=\frac{8}{9}\), इसलिए \(x^{-1}=\frac{9}{8}\)। परीक्षा में \(a^{-n}=\frac{1}{a^{n}}\) को सही दिशा में लगाएं।

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यदि (a>0) और \(a\neq 1\), तो \(\frac{a^{m+2}\cdot a^{3-m}}{a^{4}}\) किसके बराबर है?

If (a>0) and \(a\neq 1\), then \(\frac{a^{m+2}\cdot a^{3-m}}{a^{4}}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. (a)

Step 1

Concept

The numerator exponent is ((m+2)+(3-m)=5), and \(\frac{a^{5}}{a^{4}}=a\). In exams, add and subtract exponents only for the same base.

Step 2

Why this answer is correct

The correct answer is A. (a). The numerator exponent is ((m+2)+(3-m)=5), and \(\frac{a^{5}}{a^{4}}=a\). In exams, add and subtract exponents only for the same base.

Step 3

Exam Tip

ऊपर की घातें ((m+2)+(3-m)=5) हैं और \(\frac{a^{5}}{a^{4}}=a\)। परीक्षा में समान आधार की घातों को जोड़ना और घटाना याद रखें।

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कथन: यदि \(b^2-4ac<0\), तो \(ax^2+bx+c=0\) के वास्तविक मूल नहीं होते। यह कथन कैसा है?

Statement: If \(b^2-4ac<0\), then \(ax^2+bx+c=0\) has no real roots. How is this statement?

Explanation opens after your attempt
Correct Answer

A. सत्यTrue

Step 1

Concept

When \(b^2-4ac<0\), the discriminant is negative, so real roots do not exist. In exams, this is the standard rule for nature of roots.

Step 2

Why this answer is correct

The correct answer is A. सत्य / True. When \(b^2-4ac<0\), the discriminant is negative, so real roots do not exist. In exams, this is the standard rule for nature of roots.

Step 3

Exam Tip

\(b^2-4ac<0\) होने पर विविक्तकर ऋणात्मक होता है, इसलिए वास्तविक मूल नहीं होते। परीक्षा में यह मूलों की प्रकृति का मानक नियम है।

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यदि किसी मोनिक द्विघात समीकरण के दोनों मूल (7) और (7) हैं तो समीकरण कौन सा है?

If both roots of a monic quadratic equation are (7) and (7) then which equation is it?

Explanation opens after your attempt
Correct Answer

A. \(x^2-14x+49=0\)

Step 1

Concept

With both roots (7) we get ((x-7)2=0) which is \(x^2-14x+49=0\). Form a perfect square from repeated roots.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-14x+49=0\). With both roots (7) we get ((x-7)2=0) which is \(x^2-14x+49=0\). Form a perfect square from repeated roots.

Step 3

Exam Tip

दोनों मूल (7) होने पर ((x-7)2=0) मिलता है जो \(x^2-14x+49=0\) है। दोहराए मूल से पूर्ण वर्ग बनाएं।

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यदि किसी द्विघात समीकरण के मूल एक दूसरे के व्युत्क्रम हैं तो उनके गुणनफल का मान क्या होगा?

If the roots of a quadratic equation are reciprocals of each other then what is their product?

Explanation opens after your attempt
Correct Answer

B. (1)

Step 1

Concept

If the roots are (r) and \(\frac{1}{r}\) their product is (1). For reciprocal roots remember the product is (1).

Step 2

Why this answer is correct

The correct answer is B. (1). If the roots are (r) and \(\frac{1}{r}\) their product is (1). For reciprocal roots remember the product is (1).

Step 3

Exam Tip

यदि मूल (r) और \(\frac{1}{r}\) हों तो गुणनफल (1) होता है। व्युत्क्रम मूलों में गुणनफल तुरंत (1) याद रखें।

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यदि मूलों का योग (5) है और एक मूल (2) है तो दूसरा मूल क्या है?

If the sum of roots is (5) and one root is (2) then what is the other root?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

The other root is (5-2=3). Subtract the given root from the sum.

Step 2

Why this answer is correct

The correct answer is B. (3). The other root is (5-2=3). Subtract the given root from the sum.

Step 3

Exam Tip

दूसरा मूल (5-2=3) है। योग में से दिए हुए मूल को घटाएं।

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यदि एक मूल (3) है और मूलों का गुणनफल (12) है तो दूसरा मूल क्या होगा?

If one root is (3) and the product of roots is (12) then what is the other root?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

The other root is \(\frac{12}{3}=4\). In product questions divide by the given root.

Step 2

Why this answer is correct

The correct answer is B. (4). The other root is \(\frac{12}{3}=4\). In product questions divide by the given root.

Step 3

Exam Tip

दूसरा मूल \(\frac{12}{3}=4\) होगा। गुणनफल वाले प्रश्न में दिए मूल से भाग दें।

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यदि (2) किसी द्विघात बहुपद का मूल है तो कौन सा गुणनखंड निश्चित होगा?

If (2) is a root of a quadratic polynomial then which factor is certain?

Explanation opens after your attempt
Correct Answer

B. (x-2)

Step 1

Concept

If the root is (2) the corresponding factor is (x-2). For root (r) remember the factor (x-r).

Step 2

Why this answer is correct

The correct answer is B. (x-2). If the root is (2) the corresponding factor is (x-2). For root (r) remember the factor (x-r).

Step 3

Exam Tip

मूल (2) होने पर संबंधित गुणनखंड (x-2) होता है। मूल (r) के लिए गुणनखंड (x-r) याद रखें।

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यदि (1) समीकरण \(2x^2-3x+m=0\) का मूल है तो (m) का मान क्या है?

If (1) is a root of \(2x^2-3x+m=0\) then what is the value of (m)?

Explanation opens after your attempt
Correct Answer

B. (1)

Step 1

Concept

Putting (x=1) gives (2-3+m=0) so (m=1). When a root is given substitute directly in the equation.

Step 2

Why this answer is correct

The correct answer is B. (1). Putting (x=1) gives (2-3+m=0) so (m=1). When a root is given substitute directly in the equation.

Step 3

Exam Tip

(x=1) रखने पर (2-3+m=0) इसलिए (m=1)। मूल दिया हो तो समीकरण में सीधा प्रतिस्थापन करें।

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यदि किसी समीकरण के मूल (1) और (-4) हैं तो उनका योग क्या है?

If the roots of an equation are (1) and (-4) then what is their sum?

Explanation opens after your attempt
Correct Answer

B. (-3)

Step 1

Concept

The sum is (1+(-4)=-3). Be careful with the sign while adding a negative number.

Step 2

Why this answer is correct

The correct answer is B. (-3). The sum is (1+(-4)=-3). Be careful with the sign while adding a negative number.

Step 3

Exam Tip

योग (1+(-4)=-3) है। ऋणात्मक संख्या जोड़ते समय चिन्ह का ध्यान रखें।

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यदि ((x-2)(x+7)=0) है तो मूल कौन से होंगे?

If ((x-2)(x+7)=0) then what are the roots?

Explanation opens after your attempt
Correct Answer

C. (2) और (-7)(2) and (-7)

Step 1

Concept

By the zero product rule (x-2=0) or (x+7=0). Hence the roots are (2) and (-7).

Step 2

Why this answer is correct

The correct answer is C. (2) और (-7) / (2) and (-7). By the zero product rule (x-2=0) or (x+7=0). Hence the roots are (2) and (-7).

Step 3

Exam Tip

शून्य गुणनफल नियम से (x-2=0) या (x+7=0) होगा। इसलिए मूल (2) और (-7) हैं।

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यदि (-2) समीकरण \(x^2+kx+4=0\) का मूल है तो (k) का मान क्या है?

If (-2) is a root of \(x^2+kx+4=0\) then what is the value of (k)?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

Putting (x=-2) gives (4-2k+4=0) so (k=4). Be careful with signs while substituting a negative root.

Step 2

Why this answer is correct

The correct answer is B. (4). Putting (x=-2) gives (4-2k+4=0) so (k=4). Be careful with signs while substituting a negative root.

Step 3

Exam Tip

(x=-2) रखने पर (4-2k+4=0) इसलिए (k=4)। ऋणात्मक मूल रखते समय चिन्ह सावधानी से लगाएं।

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यदि (3) समीकरण \(x^2+px-6=0\) का मूल है तो (p) का मान क्या है?

If (3) is a root of \(x^2+px-6=0\) then what is the value of (p)?

Explanation opens after your attempt
Correct Answer

B. (-1)

Step 1

Concept

Putting (x=3) gives (9+3p-6=0) so (p=-1). For a parameter question substitute the root directly.

Step 2

Why this answer is correct

The correct answer is B. (-1). Putting (x=3) gives (9+3p-6=0) so (p=-1). For a parameter question substitute the root directly.

Step 3

Exam Tip

(x=3) रखने पर (9+3p-6=0) इसलिए (p=-1)। पैरामीटर के लिए मूल को सीधे रखें।

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यदि (x-a) किसी द्विघात बहुपद का गुणनखंड है तो (a) क्या होगा?

If (x-a) is a factor of a quadratic polynomial then what is (a)?

Explanation opens after your attempt
Correct Answer

B. मूलRoot

Step 1

Concept

If (x-a) is a factor then substituting (x=a) makes the value (0). So (a) is a root.

Step 2

Why this answer is correct

The correct answer is B. मूल / Root. If (x-a) is a factor then substituting (x=a) makes the value (0). So (a) is a root.

Step 3

Exam Tip

गुणनखंड (x-a) होने पर (x=a) रखने से मान (0) होता है। इसलिए (a) मूल है।

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यदि किसी द्विघात समीकरण के वास्तविक मूलों का गुणनफल ऋणात्मक है तो मूलों के चिन्ह कैसे होंगे?

If the product of real roots of a quadratic equation is negative then how are the signs of the roots?

Explanation opens after your attempt
Correct Answer

C. एक धनात्मक और एक ऋणात्मकOne positive and one negative

Step 1

Concept

A negative product occurs when one root is positive and the other is negative. \(\alpha\beta<0\) is a quick sign check.

Step 2

Why this answer is correct

The correct answer is C. एक धनात्मक और एक ऋणात्मक / One positive and one negative. A negative product occurs when one root is positive and the other is negative. \(\alpha\beta<0\) is a quick sign check.

Step 3

Exam Tip

ऋणात्मक गुणनफल तभी मिलता है जब एक मूल धनात्मक और दूसरा ऋणात्मक हो। \(\alpha\beta<0\) संकेतों की जांच का छोटा संकेत है।

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समीकरण \(x^2-6x+8=0\) का एक मूल (4) है तो दूसरा मूल क्या है?

If one root of \(x^2-6x+8=0\) is (4) then what is the other root?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

(x-2-6x+8=(x-4)(x-2)) so the other root is (2). Use the given root to find the other factor.

Step 2

Why this answer is correct

The correct answer is B. (2). (x-2-6x+8=(x-4)(x-2)) so the other root is (2). Use the given root to find the other factor.

Step 3

Exam Tip

(x-2-6x+8=(x-4)(x-2)) इसलिए दूसरा मूल (2) है। दिए गए एक मूल से दूसरा गुणनखंड खोजें।

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यदि किसी द्विघात समीकरण के दो बराबर वास्तविक मूल हों तो डिस्क्रिमिनेंट (D) का मान कैसा होता है?

If a quadratic equation has two equal real roots then what is the value of discriminant (D)?

Explanation opens after your attempt
Correct Answer

B. (D=0)

Step 1

Concept

For equal real roots (D=0). The discriminant quickly tells the nature of roots.

Step 2

Why this answer is correct

The correct answer is B. (D=0). For equal real roots (D=0). The discriminant quickly tells the nature of roots.

Step 3

Exam Tip

बराबर वास्तविक मूलों के लिए (D=0) होता है। डिस्क्रिमिनेंट से मूलों की प्रकृति जल्दी पता चलती है।

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समीकरण \(ax^2+bx+c=0\) के मूल \(\alpha\) और \(\beta\) हों तो \(\alpha\beta\) किसके बराबर होता है?

If \(\alpha\) and \(\beta\) are roots of \(ax^2+bx+c=0\) then what is \(\alpha\beta\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{c}{a}\)

Step 1

Concept

For a quadratic equation the product of roots is \(\frac{c}{a}\). Do not ignore (a).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{c}{a}\). For a quadratic equation the product of roots is \(\frac{c}{a}\). Do not ignore (a).

Step 3

Exam Tip

द्विघात समीकरण में मूलों का गुणनफल \(\frac{c}{a}\) होता है। (a) को नजरअंदाज न करें।

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समीकरण \(ax^2+bx+c=0\) के मूल \(\alpha\) और \(\beta\) हों तो \(\alpha+\beta\) किसके बराबर होता है?

If \(\alpha\) and \(\beta\) are roots of \(ax^2+bx+c=0\) then what is \(\alpha+\beta\)?

Explanation opens after your attempt
Correct Answer

A. \(-\frac{b}{a}\)

Step 1

Concept

For a quadratic equation the sum of roots is \(-\frac{b}{a}\). Keep the sign of (b) correct while using the formula.

Step 2

Why this answer is correct

The correct answer is A. \(-\frac{b}{a}\). For a quadratic equation the sum of roots is \(-\frac{b}{a}\). Keep the sign of (b) correct while using the formula.

Step 3

Exam Tip

द्विघात समीकरण में मूलों का योग \(-\frac{b}{a}\) होता है। सूत्र लगाते समय (b) का चिन्ह सही रखें।

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यदि (1) समीकरण \(x^2-kx+2=0\) का मूल है तो (k) का मान क्या है?

If (1) is a root of \(x^2-kx+2=0\) then what is the value of (k)?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

Putting (x=1) gives (1-k+2=0) so (k=3). Substitute the given root directly in the equation.

Step 2

Why this answer is correct

The correct answer is A. (3). Putting (x=1) gives (1-k+2=0) so (k=3). Substitute the given root directly in the equation.

Step 3

Exam Tip

(x=1) रखने पर (1-k+2=0) इसलिए (k=3) है। दिए गए मूल को सीधे समीकरण में रखें।

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यदि (p(2)=0) है तो (2) के बारे में सही कथन कौन सा है?

If (p(2)=0) then which statement about (2) is correct?

Explanation opens after your attempt
Correct Answer

A. (2) (p(x)=0) का मूल है(2) is a root of (p(x)=0)

Step 1

Concept

(p(2)=0) means the equation is satisfied when (x=2). Substitution is the key method in such questions.

Step 2

Why this answer is correct

The correct answer is A. (2) (p(x)=0) का मूल है / (2) is a root of (p(x)=0). (p(2)=0) means the equation is satisfied when (x=2). Substitution is the key method in such questions.

Step 3

Exam Tip

(p(2)=0) का अर्थ है कि (x=2) रखने पर समीकरण संतुष्ट होता है। ऐसे प्रश्न में प्रतिस्थापन मुख्य तरीका है।

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यदि \(x^2+kx+12=0\) एक द्विघात समीकरण है तो (k) किस पद का गुणांक है?

If \(x^2+kx+12=0\) is a quadratic equation, then (k) is the coefficient of which term?

Explanation opens after your attempt
Correct Answer

B. (x) पद(x) term

Step 1

Concept

In \(ax^2+bx+c=0\), (b) is the coefficient of (x). Here in (kx), (k) is the coefficient of (x).

Step 2

Why this answer is correct

The correct answer is B. (x) पद / (x) term. In \(ax^2+bx+c=0\), (b) is the coefficient of (x). Here in (kx), (k) is the coefficient of (x).

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) में (x) का गुणांक (b) होता है। यहां (kx) में (k) (x) का गुणांक है।

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यदि \(x=4-\sqrt{15}\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=4-\sqrt{15}\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{15}\)

Step 1

Concept

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{15}\). (\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1). Therefore the reciprocal is \(4+\sqrt{15}\).

Step 3

Exam Tip

(\(4-\sqrt{15}\)\(4+\sqrt{15}\)=1) है। इसलिए व्युत्क्रम \(4+\sqrt{15}\) होगा।

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यदि \(x=\sqrt{13}+\sqrt{12}\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=\sqrt{13}+\sqrt{12}\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{13}-\sqrt{12}\)

Step 1

Concept

Since (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)=1), the reciprocal is \(\sqrt{13}-\sqrt{12}\). In exams quickly identify conjugates where (a-b=1).

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{13}-\sqrt{12}\). Since (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)=1), the reciprocal is \(\sqrt{13}-\sqrt{12}\). In exams quickly identify conjugates where (a-b=1).

Step 3

Exam Tip

क्योंकि (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)=1), इसलिए व्युत्क्रम \(\sqrt{13}-\sqrt{12}\) है। परीक्षा में (a-b=1) वाले संयुग्मी जल्दी पहचानें।

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यदि \(x=2-\sqrt{3}\), तो \(\frac{1}{x}\) किसके बराबर है?

If \(x=2-\sqrt{3}\), then \(\frac{1}{x}\) is equal to which expression?

Explanation opens after your attempt
Correct Answer

A. \(2+\sqrt{3}\)

Step 1

Concept

Rationalizing \(\frac{1}{2-\sqrt{3}}\) with \(2+\sqrt{3}\) gives \(2+\sqrt{3}\). In exams multiply by the conjugate of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(2+\sqrt{3}\). Rationalizing \(\frac{1}{2-\sqrt{3}}\) with \(2+\sqrt{3}\) gives \(2+\sqrt{3}\). In exams multiply by the conjugate of the denominator.

Step 3

Exam Tip

\(\frac{1}{2-\sqrt{3}}\) को \(2+\sqrt{3}\) से परिमेयकृत करने पर \(2+\sqrt{3}\) मिलता है। परीक्षा में हर का संयुग्मी लगाएं।

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यदि \(a=7+4\sqrt{3}\) और \(b=7-4\sqrt{3}\), तो (ab) का मान किस प्रकार की संख्या है?

If \(a=7+4\sqrt{3}\) and \(b=7-4\sqrt{3}\), then what type of number is (ab)?

Explanation opens after your attempt
Correct Answer

A. (1), परिमेय(1), rational

Step 1

Concept

(ab=(7)2-\(4\sqrt{3}\)2=49-48=1), so it is rational. In exams apply \(a^2-b^2\) for conjugate pairs.

Step 2

Why this answer is correct

The correct answer is A. (1), परिमेय / (1), rational. (ab=(7)2-\(4\sqrt{3}\)2=49-48=1), so it is rational. In exams apply \(a^2-b^2\) for conjugate pairs.

Step 3

Exam Tip

(ab=(7)2-\(4\sqrt{3}\)2=49-48=1), इसलिए यह परिमेय है। परीक्षा में संयुग्मी युग्म पर \(a^2-b^2\) लगाएं।

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यदि \(x=\sqrt{5}+\sqrt{3}\), तो \(x^2\) किस प्रकार की संख्या है?

If \(x=\sqrt{5}+\sqrt{3}\), then what type of number is \(x^2\)?

Explanation opens after your attempt
Correct Answer

A. \(8+2\sqrt{15}\), अपरिमेय\(8+2\sqrt{15}\), irrational

Step 1

Concept

\(x^2=5+3+2\sqrt{15}=8+2\sqrt{15}\), so it is irrational. In exams use ((a+b)2) carefully.

Step 2

Why this answer is correct

The correct answer is A. \(8+2\sqrt{15}\), अपरिमेय / \(8+2\sqrt{15}\), irrational. \(x^2=5+3+2\sqrt{15}=8+2\sqrt{15}\), so it is irrational. In exams use ((a+b)2) carefully.

Step 3

Exam Tip

\(x^2=5+3+2\sqrt{15}=8+2\sqrt{15}\), इसलिए यह अपरिमेय है। परीक्षा में ((a+b)2) का प्रयोग सावधानी से करें।

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यदि (n) एक धनात्मक पूर्णांक है और \(\sqrt{n}\) अपरिमेय है तो (n) के बारे में क्या कहा जा सकता है?

If (n) is a positive integer and \(\sqrt{n}\) is irrational then what can be said about (n)?

Explanation opens after your attempt
Correct Answer

A. (n) पूर्ण वर्ग नहीं है(n) is not a perfect square

Step 1

Concept

The square root of a positive integer is irrational when it is not a perfect square. Remember this simple rule.

Step 2

Why this answer is correct

The correct answer is A. (n) पूर्ण वर्ग नहीं है / (n) is not a perfect square. The square root of a positive integer is irrational when it is not a perfect square. Remember this simple rule.

Step 3

Exam Tip

धनात्मक पूर्णांक की वर्गमूल अपरिमेय तब होती है जब वह पूर्ण वर्ग नहीं होता। यह सरल नियम याद रखें।

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यदि (r) गैर शून्य परिमेय संख्या है और (s) अपरिमेय संख्या है तो (rs) कैसा होगा?

If (r) is a non zero rational number and (s) is irrational then what is (rs)?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

A non zero rational multiplier keeps an irrational number irrational. The condition \(r\neq0\) is important.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. A non zero rational multiplier keeps an irrational number irrational. The condition \(r\neq0\) is important.

Step 3

Exam Tip

गैर शून्य परिमेय गुणक अपरिमेय संख्या को अपरिमेय ही रखता है। शर्त \(r\neq0\) महत्वपूर्ण है।

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यदि (a) परिमेय संख्या है और (b) अपरिमेय संख्या है तो (a-b) किस प्रकार की संख्या होगी?

If (a) is rational and (b) is irrational then what type of number is (a-b)?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

The difference of a rational and an irrational number is irrational. This property helps identify mixed expressions.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. The difference of a rational and an irrational number is irrational. This property helps identify mixed expressions.

Step 3

Exam Tip

परिमेय और अपरिमेय का अंतर अपरिमेय होता है। यह गुण गैर मिश्रित संख्याओं को पहचानने में मदद करता है।

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किसी धनात्मक पूर्णांक (n) के लिए यदि \(\sqrt{n}\) परिमेय है तो (n) के बारे में क्या कहा जा सकता है?

For a positive integer (n), if \(\sqrt{n}\) is rational then what can be said about (n)?

Explanation opens after your attempt
Correct Answer

A. (n) पूर्ण वर्ग है(n) is a perfect square

Step 1

Concept

The square root of a positive integer is rational only when the number is a perfect square. This is a direct MCQ rule.

Step 2

Why this answer is correct

The correct answer is A. (n) पूर्ण वर्ग है / (n) is a perfect square. The square root of a positive integer is rational only when the number is a perfect square. This is a direct MCQ rule.

Step 3

Exam Tip

धनात्मक पूर्णांक की वर्गमूल परिमेय तभी होती है जब संख्या पूर्ण वर्ग हो। यह MCQ में सीधा नियम है।

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यदि (m) और (n) परिमेय संख्याएँ हैं तो \(m\times n\) किस प्रकार की संख्या होगी?

If (m) and (n) are rational numbers then what type of number will \(m\times n\) be?

Explanation opens after your attempt
Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

The product of two rational numbers is rational. But the result is not always an integer.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. The product of two rational numbers is rational. But the result is not always an integer.

Step 3

Exam Tip

दो परिमेय संख्याओं का गुणनफल परिमेय होता है। लेकिन परिणाम हमेशा पूर्णांक नहीं होता।

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यदि (m) और (n) परिमेय संख्याएँ हैं तो (m+n) किस प्रकार की संख्या होगी?

If (m) and (n) are rational numbers then what type of number will (m+n) be?

Explanation opens after your attempt
Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

The sum of two rational numbers is rational. This is called closure of rational numbers.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. The sum of two rational numbers is rational. This is called closure of rational numbers.

Step 3

Exam Tip

दो परिमेय संख्याओं का योग परिमेय होता है। इसे परिमेय संख्याओं की बंदता कहा जाता है।

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यदि (b) एक अपरिमेय संख्या है तो (b+0) किस प्रकार की संख्या होगी?

If (b) is an irrational number then what type of number is (b+0)?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

Adding (0) leaves the irrational number unchanged. Hence (b+0=b) is irrational.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. Adding (0) leaves the irrational number unchanged. Hence (b+0=b) is irrational.

Step 3

Exam Tip

(0) जोड़ने से अपरिमेय संख्या वही रहती है। इसलिए (b+0=b) अपरिमेय है।

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यदि (a) एक परिमेय संख्या है तो (a+0) किस प्रकार की संख्या होगी?

If (a) is a rational number then what type of number is (a+0)?

Explanation opens after your attempt
Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

Adding (0) does not change the number. So (a+0=a) remains rational.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. Adding (0) does not change the number. So (a+0=a) remains rational.

Step 3

Exam Tip

(0) जोड़ने से संख्या नहीं बदलती। इसलिए (a+0=a) परिमेय रहेगा।

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यदि किसी संख्या का दशमलव विस्तार समाप्त हो जाता है तो वह कैसी संख्या होती है?

If the decimal expansion of a number terminates then what type of number is it?

Explanation opens after your attempt
Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

A terminating decimal can be written as a fraction. Hence it is a rational number.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. A terminating decimal can be written as a fraction. Hence it is a rational number.

Step 3

Exam Tip

सांत दशमलव को भिन्न के रूप में लिखा जा सकता है। इसलिए यह परिमेय संख्या होती है।

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यदि किसी संख्या का दशमलव प्रसार अनंत लेकिन आवर्ती है तो वह कैसी संख्या है?

If the decimal expansion of a number is non terminating but repeating then what type of number is it?

Explanation opens after your attempt
Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

A non terminating repeating decimal is rational. Do not call it irrational just because it is non terminating.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. A non terminating repeating decimal is rational. Do not call it irrational just because it is non terminating.

Step 3

Exam Tip

अनंत आवर्ती दशमलव परिमेय होता है। अनंत देखकर तुरंत अपरिमेय न मानें।

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यदि (a) परिमेय है और (b) अपरिमेय है तो (a+b) कब निश्चित रूप से अपरिमेय होगा?

If (a) is rational and (b) is irrational then when is (a+b) definitely irrational?

Explanation opens after your attempt
Correct Answer

A. जब (a) कोई भी परिमेय संख्या होWhen (a) is any rational number

Step 1

Concept

Adding a rational number to an irrational number gives an irrational result. This simple property often appears in MCQs.

Step 2

Why this answer is correct

The correct answer is A. जब (a) कोई भी परिमेय संख्या हो / When (a) is any rational number. Adding a rational number to an irrational number gives an irrational result. This simple property often appears in MCQs.

Step 3

Exam Tip

परिमेय में अपरिमेय जोड़ने पर परिणाम अपरिमेय रहता है। यह आसान गुण अक्सर MCQ में आता है।

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एक छात्र कहता है कि यदि ग्राफ (y)-अक्ष को ((0,0)) पर काटता है, तो (0) शून्यक नहीं हो सकता क्योंकि यह (y)-अक्ष पर है। सही निर्णय क्या है?

A student says that if a graph cuts the (y)-axis at ((0,0)), then (0) cannot be a zero because it is on the (y)-axis. What is the correct decision?

Explanation opens after your attempt
Correct Answer

B. कथन गलत है क्योंकि ((0,0)) (x)-अक्ष पर भी हैThe statement is wrong because ((0,0)) is also on the (x)-axis

Step 1

Concept

The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 2

Why this answer is correct

The correct answer is B. कथन गलत है क्योंकि ((0,0)) (x)-अक्ष पर भी है / The statement is wrong because ((0,0)) is also on the (x)-axis. The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 3

Exam Tip

मूल बिंदु दोनों अक्षों पर होता है, इसलिए (p(0)=0) है। टिप: ((0,0)) को विशेष बिंदु समझें।

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यदि किसी बहुपद के आलेख का (x)-अक्ष से केवल एक कटान (x=-8) पर है तो कौन सा कथन सही है?

If a polynomial graph has only one (x)-axis intersection at (x=-8) then which statement is correct?

Explanation opens after your attempt
Correct Answer

A. उसका एक वास्तविक शून्यक (-8) हैIt has one real zero (-8)

Step 1

Concept

There is only one intersection and its (x)-value is (-8). Tip: check both the count and the (x)-value.

Step 2

Why this answer is correct

The correct answer is A. उसका एक वास्तविक शून्यक (-8) है / It has one real zero (-8). There is only one intersection and its (x)-value is (-8). Tip: check both the count and the (x)-value.

Step 3

Exam Tip

केवल एक कटान है और उसका (x)-मान (-8) है। टिप: कटान की संख्या और (x)-मान दोनों देखें।

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यदि बहुपद (p(x)=(x-2)(x+5)) है तो आलेख (x)-अक्ष को कहाँ काटेगा?

If the polynomial is (p(x)=(x-2)(x+5)) then where will the graph cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. ((2,0)) और ((-5,0))((2,0)) and ((-5,0))

Step 1

Concept

Making each factor zero gives (x=2) and (x=-5). Tip: set each factor equal to (0).

Step 2

Why this answer is correct

The correct answer is A. ((2,0)) और ((-5,0)) / ((2,0)) and ((-5,0)). Making each factor zero gives (x=2) and (x=-5). Tip: set each factor equal to (0).

Step 3

Exam Tip

कारक शून्य करने पर (x=2) और (x=-5) मिलते हैं। टिप: हर कारक को अलग से (0) रखें।

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यदि बहुपद (p(x)=x-2-9) का आलेख बनाया जाए तो (x)-अक्ष कटान कौन से होंगे?

If the graph of (p(x)=x-2-9) is drawn then what will be the (x)-axis intersections?

Explanation opens after your attempt
Correct Answer

A. ((-3,0)) और ((3,0))((-3,0)) and ((3,0))

Step 1

Concept

Solving \(x^2-9=0\) gives \(x=\pm3\). Tip: recognize \(a^2-b^2\).

Step 2

Why this answer is correct

The correct answer is A. ((-3,0)) और ((3,0)) / ((-3,0)) and ((3,0)). Solving \(x^2-9=0\) gives \(x=\pm3\). Tip: recognize \(a^2-b^2\).

Step 3

Exam Tip

\(x^2-9=0\) से \(x=\pm3\) मिलता है। टिप: \(a^2-b^2\) को पहचानें।

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यदि (x)-अक्ष को काटने वाले बिंदु ((-7,0)) और ((-3,0)) हैं तो बड़ा शून्यक कौन सा है?

If the points cutting the (x)-axis are ((-7,0)) and ((-3,0)) then which is the greater zero?

Explanation opens after your attempt
Correct Answer

A. (-3)

Step 1

Concept

The zeroes are (-7) and (-3) and (-3) is greater. Tip: the number to the right on the number line is greater.

Step 2

Why this answer is correct

The correct answer is A. (-3). The zeroes are (-7) and (-3) and (-3) is greater. Tip: the number to the right on the number line is greater.

Step 3

Exam Tip

शून्यक (-7) और (-3) हैं और (-3) बड़ा है। टिप: संख्या रेखा पर दाईं ओर वाली संख्या बड़ी होती है।

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यदि आलेख ((1,0)), ((4,0)) और ((0,6)) से गुजरता है तो शून्यक कौन से हैं?

If a graph passes through ((1,0)), ((4,0)) and ((0,6)) then what are the zeroes?

Explanation opens after your attempt
Correct Answer

A. (1) और (4)(1) and (4)

Step 1

Concept

Only the points with (y=0) give zeroes. Tip: treat ((0,6)) as a (y)-axis intercept.

Step 2

Why this answer is correct

The correct answer is A. (1) और (4) / (1) and (4). Only the points with (y=0) give zeroes. Tip: treat ((0,6)) as a (y)-axis intercept.

Step 3

Exam Tip

केवल (y=0) वाले बिंदु शून्यक देते हैं। टिप: ((0,6)) को (y)-अक्ष कटान समझें।

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यदि (p(5)=0) और (p(-2)=0) है तो आलेख (x)-अक्ष को किन (x)-मानों पर काटेगा?

If (p(5)=0) and (p(-2)=0) then at which (x)-values will the graph cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. (5) और (-2)(5) and (-2)

Step 1

Concept

The (x)-values where (p(x)=0) give the intersections. Tip: read (p(a)=0) directly as an (x=a) cut.

Step 2

Why this answer is correct

The correct answer is A. (5) और (-2) / (5) and (-2). The (x)-values where (p(x)=0) give the intersections. Tip: read (p(a)=0) directly as an (x=a) cut.

Step 3

Exam Tip

जिन (x)-मानों पर (p(x)=0) है वही कटान देते हैं। टिप: (p(a)=0) को सीधे (x=a) कटान मानें।

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