Class 9 Mathematics - Introduction to Polynomials - Definition of polynomial Expert Quiz

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वर्गमूल सर्पिल में पहले समकोण त्रिभुज की दोनों लंबवत भुजाएँ (1) और (1) हैं। उसकी कर्ण-लंबाई कौन-सा बिंदु देती है?

In the square root spiral, the first right triangle has perpendicular sides (1) and (1). Which point does its hypotenuse length give?

Explanation opens after your attempt
Correct Answer

B. \( \sqrt{2} \)

Step 1

Concept

By Pythagoras, the hypotenuse is \( \sqrt{1^2+1^2}=\sqrt{2} \). In exams, connect the first triangle with \( \sqrt{2} \).

Step 2

Why this answer is correct

The correct answer is B. \( \sqrt{2} \). By Pythagoras, the hypotenuse is \( \sqrt{1^2+1^2}=\sqrt{2} \). In exams, connect the first triangle with \( \sqrt{2} \).

Step 3

Exam Tip

पाइथागोरस प्रमेय से कर्ण \( \sqrt{1^2+1^2}=\sqrt{2} \) है। परीक्षा में पहला त्रिभुज हमेशा \( \sqrt{2} \) से जोड़ें।

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यदि वर्गमूल सर्पिल में किसी चरण पर त्रिज्या \( \sqrt{8} \) है और उस पर लंबवत (1) इकाई जोड़ी जाती है, तो अगली त्रिज्या क्या होगी?

If a square root spiral has radius \( \sqrt{8} \) at a step and a perpendicular unit segment (1) is added, what will be the next radius?

Explanation opens after your attempt
Correct Answer

D. \( \sqrt{9} \)

Step 1

Concept

The new radius is ( \sqrt{\(\sqrt{8}\)2+12}=\sqrt{9}=3 ). Remember that each new step adds (1) inside the square root.

Step 2

Why this answer is correct

The correct answer is D. \( \sqrt{9} \). The new radius is ( \sqrt{\(\sqrt{8}\)2+12}=\sqrt{9}=3 ). Remember that each new step adds (1) inside the square root.

Step 3

Exam Tip

नई त्रिज्या ( \sqrt{\(\sqrt{8}\)2+12}=\sqrt{9}=3 ) होगी। याद रखें हर नए चरण में वर्ग के अंदर (1) जुड़ता है।

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वर्गमूल सर्पिल में \( \sqrt{5} \) बनाने के लिए \( \sqrt{4} \) वाली त्रिज्या पर किस प्रकार का रेखाखंड बनाया जाता है?

To construct \( \sqrt{5} \) in a square root spiral, what type of segment is drawn on the radius \( \sqrt{4} \)?

Explanation opens after your attempt
Correct Answer

A. त्रिज्या पर लंबवत (1) इकाईPerpendicular unit segment of (1)

Step 1

Concept

For \( \sqrt{5} \), a unit segment (1) is drawn perpendicular to \( \sqrt{4} \). Perpendicularity is the key construction clue.

Step 2

Why this answer is correct

The correct answer is A. त्रिज्या पर लंबवत (1) इकाई / Perpendicular unit segment of (1). For \( \sqrt{5} \), a unit segment (1) is drawn perpendicular to \( \sqrt{4} \). Perpendicularity is the key construction clue.

Step 3

Exam Tip

\( \sqrt{5} \) के लिए \( \sqrt{4} \) पर (1) इकाई लंबवत जोड़ते हैं। निर्माण में लंबवतता सबसे जरूरी संकेत है।

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वर्गमूल सर्पिल में यदि \(OP_n=\sqrt{n}\) है, तो \(P_nP_{n+1}\) की लंबाई क्या रखी जाती है?

In a square root spiral, if \(OP_n=\sqrt{n}\), what length is kept for \(P_nP_{n+1}\)?

Explanation opens after your attempt
Correct Answer

C. (1)

Step 1

Concept

Each new right triangle uses an outer side of (1) unit. This gives \(OP_{n+1}=\sqrt{n+1}\).

Step 2

Why this answer is correct

The correct answer is C. (1). Each new right triangle uses an outer side of (1) unit. This gives \(OP_{n+1}=\sqrt{n+1}\).

Step 3

Exam Tip

हर नए समकोण त्रिभुज में बाहरी भुजा (1) इकाई होती है। इसी से \(OP_{n+1}=\sqrt{n+1}\) मिलता है।

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एक छात्र ने \( \sqrt{7} \) बनाने के बाद अगली इकाई भुजा लंबवत नहीं बनाई। कौन-सा निष्कर्ष सही है?

A student constructed \( \sqrt{7} \) and then did not draw the next unit side perpendicular. Which conclusion is correct?

Explanation opens after your attempt
Correct Answer

B. अगली त्रिज्या निश्चित रूप से \( \sqrt{8} \) नहीं मानी जा सकतीThe next radius cannot be surely taken as \( \sqrt{8} \)

Step 1

Concept

A right angle is necessary for Pythagoras. Without a perpendicular side, \( \sqrt{n+1} \) is not guaranteed.

Step 2

Why this answer is correct

The correct answer is B. अगली त्रिज्या निश्चित रूप से \( \sqrt{8} \) नहीं मानी जा सकती / The next radius cannot be surely taken as \( \sqrt{8} \). A right angle is necessary for Pythagoras. Without a perpendicular side, \( \sqrt{n+1} \) is not guaranteed.

Step 3

Exam Tip

पाइथागोरस प्रमेय के लिए समकोण जरूरी है। लंबवत भुजा न हो तो \( \sqrt{n+1} \) की गारंटी नहीं रहती।

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वर्गमूल सर्पिल में \( \sqrt{10} \) तक पहुँचने के लिए \( \sqrt{2} \) के बाद कितने नए इकाई रेखाखंड जोड़े जाते हैं?

In a square root spiral, after \( \sqrt{2} \), how many new unit segments are added to reach \( \sqrt{10} \)?

Explanation opens after your attempt
Correct Answer

D. (8)

Step 1

Concept

From \( \sqrt{2} \) to \( \sqrt{10} \), the inside number increases (8) times. Each increase needs one new unit segment.

Step 2

Why this answer is correct

The correct answer is D. (8). From \( \sqrt{2} \) to \( \sqrt{10} \), the inside number increases (8) times. Each increase needs one new unit segment.

Step 3

Exam Tip

\( \sqrt{2} \) से \( \sqrt{10} \) तक (2) से (10) जाने में (8) वृद्धि होती हैं। हर वृद्धि के लिए एक नया इकाई रेखाखंड लगता है।

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यदि सर्पिल में बिंदु \(P_6\) ऐसा है कि \(OP_6=\sqrt{6}\), तो अगले बने समकोण त्रिभुज का क्षेत्रफल कितना होगा?

If point \(P_6\) in the spiral satisfies \(OP_6=\sqrt{6}\), what is the area of the next right triangle formed?

Explanation opens after your attempt
Correct Answer

C. \( \frac{\sqrt{6}}{2} \)

Step 1

Concept

The next triangle has perpendicular sides \( \sqrt{6} \) and (1). Its area is \( \frac{1}{2}\times \sqrt{6}\times 1=\frac{\sqrt{6}}{2} \).

Step 2

Why this answer is correct

The correct answer is C. \( \frac{\sqrt{6}}{2} \). The next triangle has perpendicular sides \( \sqrt{6} \) and (1). Its area is \( \frac{1}{2}\times \sqrt{6}\times 1=\frac{\sqrt{6}}{2} \).

Step 3

Exam Tip

अगले त्रिभुज की लंबवत भुजाएँ \( \sqrt{6} \) और (1) हैं। क्षेत्रफल \( \frac{1}{2}\times \sqrt{6}\times 1=\frac{\sqrt{6}}{2} \) होगा।

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वर्गमूल सर्पिल में \( \sqrt{13} \) किस प्रकार की संख्या को संख्या रेखा पर दर्शाने का उदाहरण है?

In a square root spiral, \( \sqrt{13} \) is an example of representing which type of number on the number line?

Explanation opens after your attempt
Correct Answer

A. अपरिमेय संख्याIrrational number

Step 1

Concept

Since (13) is not a perfect square, \( \sqrt{13} \) is irrational. The square root spiral shows such square roots geometrically.

Step 2

Why this answer is correct

The correct answer is A. अपरिमेय संख्या / Irrational number. Since (13) is not a perfect square, \( \sqrt{13} \) is irrational. The square root spiral shows such square roots geometrically.

Step 3

Exam Tip

(13) पूर्ण वर्ग नहीं है इसलिए \( \sqrt{13} \) अपरिमेय है। वर्गमूल सर्पिल ऐसे वर्गमूलों को रचनात्मक रूप से दिखाता है।

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यदि \(OP_k=\sqrt{k}\) और \(OP_{k+1}=\sqrt{17}\), तो (k) का मान क्या होगा?

If \(OP_k=\sqrt{k}\) and \(OP_{k+1}=\sqrt{17}\), what is the value of (k)?

Explanation opens after your attempt
Correct Answer

D. (16)

Step 1

Concept

Since \(OP_{k+1}=\sqrt{k+1}\), (k+1=17) and (k=16). Track the one-step increase carefully.

Step 2

Why this answer is correct

The correct answer is D. (16). Since \(OP_{k+1}=\sqrt{k+1}\), (k+1=17) and (k=16). Track the one-step increase carefully.

Step 3

Exam Tip

\(OP_{k+1}=\sqrt{k+1}\), इसलिए (k+1=17) और (k=16)। सूचकांक में एक की वृद्धि ध्यान रखें।

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वर्गमूल सर्पिल में \( \sqrt{9} \) बिंदु मूल बिंदु से कितनी दूरी पर होगा?

In the square root spiral, how far is the \( \sqrt{9} \) point from the origin?

Explanation opens after your attempt
Correct Answer

B. (3) इकाई(3) units

Step 1

Concept

Because \( \sqrt{9}=3 \), the distance is (3) units. Simplify square roots of perfect squares immediately.

Step 2

Why this answer is correct

The correct answer is B. (3) इकाई / (3) units. Because \( \sqrt{9}=3 \), the distance is (3) units. Simplify square roots of perfect squares immediately.

Step 3

Exam Tip

क्योंकि \( \sqrt{9}=3 \), इसलिए दूरी (3) इकाई है। पूर्ण वर्गों के वर्गमूल को तुरंत सरल करें।

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किस कथन से वर्गमूल सर्पिल की पुनरावर्ती रचना सही व्यक्त होती है?

Which statement correctly expresses the recursive construction of a square root spiral?

Explanation opens after your attempt
Correct Answer

C. \(OP_{n+1}^2=OP_n^2+1\)

Step 1

Concept

The new right triangle is formed using \(OP_n\) and (1). Hence the square of the hypotenuse increases by (1).

Step 2

Why this answer is correct

The correct answer is C. \(OP_{n+1}^2=OP_n^2+1\). The new right triangle is formed using \(OP_n\) and (1). Hence the square of the hypotenuse increases by (1).

Step 3

Exam Tip

नया समकोण त्रिभुज \(OP_n\) और (1) से बनता है। इसलिए कर्ण के वर्ग में (1) जुड़ता है।

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यदि किसी चरण में कर्ण (5) इकाई है और अगली इकाई लंबवत खींची जाती है, तो अगली कर्ण-लंबाई क्या होगी?

If the hypotenuse at a step is (5) units and the next unit perpendicular is drawn, what is the next hypotenuse length?

Explanation opens after your attempt
Correct Answer

A. \( \sqrt{26} \)

Step 1

Concept

The new length is \( \sqrt{5^2+1^2}=\sqrt{26} \). The length (1) is not added directly; squares are added.

Step 2

Why this answer is correct

The correct answer is A. \( \sqrt{26} \). The new length is \( \sqrt{5^2+1^2}=\sqrt{26} \). The length (1) is not added directly; squares are added.

Step 3

Exam Tip

नई लंबाई \( \sqrt{5^2+1^2}=\sqrt{26} \) है। लंबाई (1) सीधे नहीं जुड़ती, वर्गों में जुड़ती है।

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वर्गमूल सर्पिल में \( \sqrt{20} \) और \( \sqrt{21} \) बनाने वाले लगातार दो त्रिज्या-खंडों के वर्गों का अंतर कितना है?

In the square root spiral, what is the difference between the squares of two consecutive radii forming \( \sqrt{20} \) and \( \sqrt{21} \)?

Explanation opens after your attempt
Correct Answer

D. (1)

Step 1

Concept

The difference of squares is (21-20=1). This difference stays constant at each consecutive step.

Step 2

Why this answer is correct

The correct answer is D. (1). The difference of squares is (21-20=1). This difference stays constant at each consecutive step.

Step 3

Exam Tip

वर्गों का अंतर (21-20=1) है। यही अंतर हर लगातार चरण में स्थिर रहता है।

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यदि \( \sqrt{14} \) की त्रिज्या पर (1) इकाई लंबवत जोड़कर नया कर्ण बनाया जाए, तो नए और पुराने कर्णों के वर्गों का अनुपात क्या होगा?

If a unit perpendicular is added to the radius \( \sqrt{14} \) to form a new hypotenuse, what is the ratio of the squares of the new and old hypotenuses?

Explanation opens after your attempt
Correct Answer

C. (15:14)

Step 1

Concept

The new hypotenuse is \( \sqrt{15} \). Therefore, the ratio of squares is (15:14).

Step 2

Why this answer is correct

The correct answer is C. (15:14). The new hypotenuse is \( \sqrt{15} \). Therefore, the ratio of squares is (15:14).

Step 3

Exam Tip

नया कर्ण \( \sqrt{15} \) होगा। इसलिए वर्गों का अनुपात (15:14) है।

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किस बिंदु तक सर्पिल बनाते समय \( \sqrt{1} \) से शुरू करके कुल (11) त्रिज्या-बिंदु मिलते हैं?

Up to which point will the spiral have (11) radius-points if it starts from \( \sqrt{1} \)?

Explanation opens after your attempt
Correct Answer

B. \( \sqrt{11} \)

Step 1

Concept

From \( \sqrt{1} \) to \( \sqrt{11} \), there are (11) points. Include the initial \( \sqrt{1} \) in counting.

Step 2

Why this answer is correct

The correct answer is B. \( \sqrt{11} \). From \( \sqrt{1} \) to \( \sqrt{11} \), there are (11) points. Include the initial \( \sqrt{1} \) in counting.

Step 3

Exam Tip

\( \sqrt{1} \) से \( \sqrt{11} \) तक कुल (11) बिंदु होते हैं। गिनती में आरंभिक \( \sqrt{1} \) को भी शामिल करें।

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वर्गमूल सर्पिल में \( \sqrt{18} \) बनाने के ठीक पहले कौन-सा कर्ण बन चुका होता है?

In the square root spiral, which hypotenuse is already formed just before constructing \( \sqrt{18} \)?

Explanation opens after your attempt
Correct Answer

A. \( \sqrt{17} \)

Step 1

Concept

\( \sqrt{18} \) is formed by adding a perpendicular (1) to the previous hypotenuse \( \sqrt{17} \). Always check the previous square root in the sequence.

Step 2

Why this answer is correct

The correct answer is A. \( \sqrt{17} \). \( \sqrt{18} \) is formed by adding a perpendicular (1) to the previous hypotenuse \( \sqrt{17} \). Always check the previous square root in the sequence.

Step 3

Exam Tip

\( \sqrt{18} \) पिछले कर्ण \( \sqrt{17} \) पर (1) लंबवत जोड़कर बनता है। क्रम में हमेशा पिछले वर्गमूल को देखें।

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एक सर्पिल में \(OP_1=1\) और हर नए चरण में \(P_iP_{i+1}=1\) लंबवत है। \(OP_7\) क्या होगा?

In a spiral, \(OP_1=1\) and at every new step \(P_iP_{i+1}=1\) perpendicular. What is \(OP_7\)?

Explanation opens after your attempt
Correct Answer

C. \( \sqrt{7} \)

Step 1

Concept

The construction gives \(OP_n=\sqrt{n}\). Hence \(OP_7=\sqrt{7}\).

Step 2

Why this answer is correct

The correct answer is C. \( \sqrt{7} \). The construction gives \(OP_n=\sqrt{n}\). Hence \(OP_7=\sqrt{7}\).

Step 3

Exam Tip

रचना से \(OP_n=\sqrt{n}\) होता है। इसलिए \(OP_7=\sqrt{7}\) है।

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यदि \( \sqrt{12} \) वाले चरण पर बना त्रिभुज \( \sqrt{11} \) और (1) से बना है, तो इस त्रिभुज का कर्ण कौन-सा है?

If the triangle at the \( \sqrt{12} \) step is formed by \( \sqrt{11} \) and (1), which is its hypotenuse?

Explanation opens after your attempt
Correct Answer

D. \( \sqrt{12} \)

Step 1

Concept

The hypotenuse is ( \sqrt{\(\sqrt{11}\)2+12}=\sqrt{12} ). The step is identified by the new hypotenuse.

Step 2

Why this answer is correct

The correct answer is D. \( \sqrt{12} \). The hypotenuse is ( \sqrt{\(\sqrt{11}\)2+12}=\sqrt{12} ). The step is identified by the new hypotenuse.

Step 3

Exam Tip

कर्ण ( \sqrt{\(\sqrt{11}\)2+12}=\sqrt{12} ) है। चरण का नाम नए कर्ण से पहचाना जाता है।

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वर्गमूल सर्पिल में \( \sqrt{3} \) और \( \sqrt{4} \) के निर्माण में कौन-सी बात समान रहती है?

In constructing \( \sqrt{3} \) and \( \sqrt{4} \) in a square root spiral, what remains common?

Explanation opens after your attempt
Correct Answer

B. दोनों में नई बाहरी भुजा (1) इकाई और लंबवत हैThe new outer side is (1) unit and perpendicular in both

Step 1

Concept

At every new step, the added side is (1) unit and perpendicular. The old radius keeps changing.

Step 2

Why this answer is correct

The correct answer is B. दोनों में नई बाहरी भुजा (1) इकाई और लंबवत है / The new outer side is (1) unit and perpendicular in both. At every new step, the added side is (1) unit and perpendicular. The old radius keeps changing.

Step 3

Exam Tip

हर नए चरण में नई जोड़ी गई भुजा (1) इकाई और लंबवत होती है। पुरानी त्रिज्या बदलती रहती है।

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यदि \( \sqrt{27} \) तक सर्पिल बनाया गया है, तो मूल बिंदु से अंतिम बिंदु की दूरी किस अंतराल में होगी?

If the spiral is constructed up to \( \sqrt{27} \), in which interval will the final distance from the origin lie?

Explanation opens after your attempt
Correct Answer

B. (5) और (6) के बीचBetween (5) and (6)

Step 1

Concept

Since (25<27<36), \(5<\sqrt{27}<6\). Estimating with perfect squares is a quick method.

Step 2

Why this answer is correct

The correct answer is B. (5) और (6) के बीच / Between (5) and (6). Since (25<27<36), \(5<\sqrt{27}<6\). Estimating with perfect squares is a quick method.

Step 3

Exam Tip

क्योंकि (25<27<36), इसलिए \(5<\sqrt{27}<6\)। पूर्ण वर्गों से अनुमान लगाना तेज तरीका है।

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वर्गमूल सर्पिल में \( \sqrt{16} \) बिंदु किस पूर्णांक दूरी पर आता है?

In the square root spiral, the point \( \sqrt{16} \) lies at which integer distance?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

\( \sqrt{16}=4 \), so it lies at integer distance (4). Points for perfect squares give integer distances in the spiral.

Step 2

Why this answer is correct

The correct answer is C. (4). \( \sqrt{16}=4 \), so it lies at integer distance (4). Points for perfect squares give integer distances in the spiral.

Step 3

Exam Tip

\( \sqrt{16}=4 \), इसलिए यह पूर्णांक दूरी (4) पर आता है। पूर्ण वर्गों पर सर्पिल के बिंदु पूर्णांक दूरी देते हैं।

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किस कारण वर्गमूल सर्पिल को संख्या रेखा पर अपरिमेय संख्याओं को दर्शाने में उपयोगी माना जाता है?

Why is the square root spiral considered useful for representing irrational numbers on the number line?

Explanation opens after your attempt
Correct Answer

C. क्योंकि यह \( \sqrt{n} \) जैसी दूरियों को रचनात्मक रूप से देता हैBecause it geometrically gives distances like \( \sqrt{n} \)

Step 1

Concept

The spiral constructs hypotenuse lengths \( \sqrt{n} \). When (n) is not a perfect square, such lengths are irrational.

Step 2

Why this answer is correct

The correct answer is C. क्योंकि यह \( \sqrt{n} \) जैसी दूरियों को रचनात्मक रूप से देता है / Because it geometrically gives distances like \( \sqrt{n} \). The spiral constructs hypotenuse lengths \( \sqrt{n} \). When (n) is not a perfect square, such lengths are irrational.

Step 3

Exam Tip

सर्पिल \( \sqrt{n} \) लंबाई वाले कर्ण बनाता है। जब (n) पूर्ण वर्ग नहीं होता, तब ऐसी लंबाइयाँ अपरिमेय होती हैं।

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यदि \( \sqrt{24} \) की त्रिज्या पर इकाई लंबवत जोड़ते हैं, तो नया कर्ण किस पूर्णांक के सबसे निकट होगा?

If a unit perpendicular is added to the radius \( \sqrt{24} \), the new hypotenuse will be closest to which integer?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

The new hypotenuse is \( \sqrt{25}=5 \). Here the answer is exactly (5), not just close.

Step 2

Why this answer is correct

The correct answer is B. (5). The new hypotenuse is \( \sqrt{25}=5 \). Here the answer is exactly (5), not just close.

Step 3

Exam Tip

नया कर्ण \( \sqrt{25}=5 \) है। यहाँ उत्तर ठीक (5) है, केवल निकट नहीं।

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एक विद्यार्थी ने \( \sqrt{6} \) से अगला कर्ण \( \sqrt{6}+1 \) लिखा। सही सुधार क्या है?

A student wrote the next hypotenuse after \( \sqrt{6} \) as \( \sqrt{6}+1 \). What is the correct correction?

Explanation opens after your attempt
Correct Answer

A. अगला कर्ण \( \sqrt{7} \) होगाThe next hypotenuse is \( \sqrt{7} \)

Step 1

Concept

The next hypotenuse is ( \sqrt{\(\sqrt{6}\)2+12}=\sqrt{7} ). Squares are added, not lengths.

Step 2

Why this answer is correct

The correct answer is A. अगला कर्ण \( \sqrt{7} \) होगा / The next hypotenuse is \( \sqrt{7} \). The next hypotenuse is ( \sqrt{\(\sqrt{6}\)2+12}=\sqrt{7} ). Squares are added, not lengths.

Step 3

Exam Tip

अगला कर्ण ( \sqrt{\(\sqrt{6}\)2+12}=\sqrt{7} ) है। लंबाइयाँ नहीं, वर्ग जोड़े जाते हैं।

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वर्गमूल सर्पिल में \( \sqrt{2} \) से \( \sqrt{3} \) बनाते समय कौन-सा त्रिभुज बनता है?

Which triangle is formed while constructing \( \sqrt{3} \) from \( \sqrt{2} \) in the square root spiral?

Explanation opens after your attempt
Correct Answer

A. भुजाएँ \( \sqrt{2} \), (1), कर्ण \( \sqrt{3} \)Sides \( \sqrt{2} \), (1), hypotenuse \( \sqrt{3} \)

Step 1

Concept

The old hypotenuse \( \sqrt{2} \) makes a right angle with the new side (1). The new hypotenuse is \( \sqrt{3} \).

Step 2

Why this answer is correct

The correct answer is A. भुजाएँ \( \sqrt{2} \), (1), कर्ण \( \sqrt{3} \) / Sides \( \sqrt{2} \), (1), hypotenuse \( \sqrt{3} \). The old hypotenuse \( \sqrt{2} \) makes a right angle with the new side (1). The new hypotenuse is \( \sqrt{3} \).

Step 3

Exam Tip

पुराना कर्ण \( \sqrt{2} \) नई भुजा (1) के साथ समकोण बनाता है। नया कर्ण \( \sqrt{3} \) होता है।

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यदि वर्गमूल सर्पिल में \( \sqrt{30} \) बनाया गया है, तो उसके ठीक अगले निर्माण में नया कर्ण कौन-सा होगा?

If \( \sqrt{30} \) has been constructed in the square root spiral, what will be the new hypotenuse in the immediate next construction?

Explanation opens after your attempt
Correct Answer

B. \( \sqrt{31} \)

Step 1

Concept

At each step, the number under the square root increases by (1). Therefore, after \( \sqrt{30} \), \( \sqrt{31} \) is formed.

Step 2

Why this answer is correct

The correct answer is B. \( \sqrt{31} \). At each step, the number under the square root increases by (1). Therefore, after \( \sqrt{30} \), \( \sqrt{31} \) is formed.

Step 3

Exam Tip

हर चरण में वर्ग के अंदर संख्या (1) बढ़ती है। इसलिए \( \sqrt{30} \) के बाद \( \sqrt{31} \) बनेगा।

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किस विकल्प में वर्गमूल सर्पिल के पहले चार कर्णों का सही क्रम है?

Which option gives the correct order of the first four hypotenuse lengths in the square root spiral?

Explanation opens after your attempt
Correct Answer

C. \( \sqrt{2},\sqrt{3},\sqrt{4},\sqrt{5} \)

Step 1

Concept

If hypotenuses are counted from the first right triangle, the sequence starts at \( \sqrt{2} \). The base \( \sqrt{1} \) is the initial radius.

Step 2

Why this answer is correct

The correct answer is C. \( \sqrt{2},\sqrt{3},\sqrt{4},\sqrt{5} \). If hypotenuses are counted from the first right triangle, the sequence starts at \( \sqrt{2} \). The base \( \sqrt{1} \) is the initial radius.

Step 3

Exam Tip

यदि कर्णों को पहले बने समकोण त्रिभुज से गिनें, तो क्रम \( \sqrt{2} \) से शुरू होता है। आधार \( \sqrt{1} \) प्रारंभिक त्रिज्या है।

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वर्गमूल सर्पिल में \( \sqrt{50} \) की दूरी का सरलीकृत रूप क्या होगा?

What is the simplified form of the distance \( \sqrt{50} \) in the square root spiral?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\( \sqrt{50}=\sqrt{25\times 2}=5\sqrt{2} \). Extract the largest perfect square while simplifying.

Step 2

Why this answer is correct

The correct answer is A. \(5\sqrt{2}\). \( \sqrt{50}=\sqrt{25\times 2}=5\sqrt{2} \). Extract the largest perfect square while simplifying.

Step 3

Exam Tip

\( \sqrt{50}=\sqrt{25\times 2}=5\sqrt{2} \) है। सरलीकरण में सबसे बड़ा पूर्ण वर्ग निकालें।

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यदि किसी त्रिभुज की पुरानी त्रिज्या \( \sqrt{35} \) है, तो नया कर्ण किस दो पूर्णांकों के बीच होगा?

If the old radius of a triangle is \( \sqrt{35} \), between which two integers will the new hypotenuse lie?

Explanation opens after your attempt
Correct Answer

C. (6) और (7)(6) and (7)

Step 1

Concept

The new hypotenuse is \( \sqrt{36}=6 \), exactly (6). Among the given options, it is associated with the (6) and (7) range.

Step 2

Why this answer is correct

The correct answer is C. (6) और (7) / (6) and (7). The new hypotenuse is \( \sqrt{36}=6 \), exactly (6). Among the given options, it is associated with the (6) and (7) range.

Step 3

Exam Tip

नया कर्ण \( \sqrt{36}=6 \) होगा, जो (6) के बराबर है। दिए विकल्पों में सही जानकारी के अनुसार यह (6) और (7) वाले क्षेत्र से जुड़ता है।

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वर्गमूल सर्पिल में \( \sqrt{15} \) बनाने वाले त्रिभुज की पुरानी त्रिज्या और नई भुजा कौन-सी होंगी?

In the triangle that constructs \( \sqrt{15} \) in the square root spiral, what are the old radius and the new side?

Explanation opens after your attempt
Correct Answer

B. \( \sqrt{14} \) और (1)\( \sqrt{14} \) and (1)

Step 1

Concept

For \( \sqrt{15} \), the previous radius is \( \sqrt{14} \) and the new side is (1). This sequence identifies the spiral.

Step 2

Why this answer is correct

The correct answer is B. \( \sqrt{14} \) और (1) / \( \sqrt{14} \) and (1). For \( \sqrt{15} \), the previous radius is \( \sqrt{14} \) and the new side is (1). This sequence identifies the spiral.

Step 3

Exam Tip

\( \sqrt{15} \) के लिए पिछली त्रिज्या \( \sqrt{14} \) होती है और नई भुजा (1) होती है। यही क्रम सर्पिल की पहचान है।

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यदि \(OP_n=\sqrt{n}\), तो \(OP_{n+3}\) और \(OP_n\) के वर्गों का अंतर क्या होगा?

If \(OP_n=\sqrt{n}\), what is the difference between the squares of \(OP_{n+3}\) and \(OP_n\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

\(OP_{n+3}^2=n+3\) and \(OP_n^2=n\), so the difference is (3). Working with squares makes the question easier.

Step 2

Why this answer is correct

The correct answer is C. (3). \(OP_{n+3}^2=n+3\) and \(OP_n^2=n\), so the difference is (3). Working with squares makes the question easier.

Step 3

Exam Tip

\(OP_{n+3}^2=n+3\) और \(OP_n^2=n\), इसलिए अंतर (3) है। वर्गों पर काम करने से प्रश्न आसान होता है।

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किस चरण पर नया कर्ण \(2\sqrt{3}\) के बराबर हो जाता है?

At which step does the new hypotenuse become equal to \(2\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. \( \sqrt{12} \) चरण\( \sqrt{12} \) step

Step 1

Concept

\(2\sqrt{3}=\sqrt{4\times 3}=\sqrt{12}\). So it appears at the \( \sqrt{12} \) step.

Step 2

Why this answer is correct

The correct answer is B. \( \sqrt{12} \) चरण / \( \sqrt{12} \) step. \(2\sqrt{3}=\sqrt{4\times 3}=\sqrt{12}\). So it appears at the \( \sqrt{12} \) step.

Step 3

Exam Tip

\(2\sqrt{3}=\sqrt{4\times 3}=\sqrt{12}\) है। इसलिए यह \( \sqrt{12} \) चरण पर मिलता है।

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वर्गमूल सर्पिल में \( \sqrt{40} \) की त्रिज्या को सरल करने पर कौन-सा रूप मिलेगा?

What form is obtained after simplifying the radius \( \sqrt{40} \) in the square root spiral?

Explanation opens after your attempt
Correct Answer

C. \(2\sqrt{10}\)

Step 1

Concept

\( \sqrt{40}=\sqrt{4\times 10}=2\sqrt{10} \). The perfect square (4) comes outside.

Step 2

Why this answer is correct

The correct answer is C. \(2\sqrt{10}\). \( \sqrt{40}=\sqrt{4\times 10}=2\sqrt{10} \). The perfect square (4) comes outside.

Step 3

Exam Tip

\( \sqrt{40}=\sqrt{4\times 10}=2\sqrt{10} \) है। पूर्ण वर्ग (4) बाहर निकलता है।

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यदि \( \sqrt{48} \) तक सर्पिल बना है, तो अंतिम दूरी (6) और (7) के बीच क्यों होगी?

If the spiral is constructed up to \( \sqrt{48} \), why will the final distance lie between (6) and (7)?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (36<48<49)Because (36<48<49)

Step 1

Concept

Since \(36=6^2\) and \(49=7^2\), \(6<\sqrt{48}<7\). Comparing with perfect squares is always reliable.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (36<48<49) / Because (36<48<49). Since \(36=6^2\) and \(49=7^2\), \(6<\sqrt{48}<7\). Comparing with perfect squares is always reliable.

Step 3

Exam Tip

\(36=6^2\) और \(49=7^2\), इसलिए \(6<\sqrt{48}<7\)। पूर्ण वर्गों की तुलना हमेशा भरोसेमंद रहती है।

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एक वर्गमूल सर्पिल में \(OP_4=2\) है। इसका सही अर्थ क्या है?

In a square root spiral, \(OP_4=2\). What does this correctly mean?

Explanation opens after your attempt
Correct Answer

B. \(OP_4=\sqrt{4}\) और दूरी (2) इकाई है\(OP_4=\sqrt{4}\) and the distance is (2) units

Step 1

Concept

Because \( \sqrt{4}=2 \), the distance \(OP_4\) is (2). Understand the index and the distance separately.

Step 2

Why this answer is correct

The correct answer is B. \(OP_4=\sqrt{4}\) और दूरी (2) इकाई है / \(OP_4=\sqrt{4}\) and the distance is (2) units. Because \( \sqrt{4}=2 \), the distance \(OP_4\) is (2). Understand the index and the distance separately.

Step 3

Exam Tip

क्योंकि \( \sqrt{4}=2 \), इसलिए \(OP_4\) की दूरी (2) है। सूचकांक और दूरी को अलग-अलग समझें।

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यदि \( \sqrt{63} \) की त्रिज्या बनी है, तो यह किस सरल रूप के बराबर है?

If the radius \( \sqrt{63} \) is formed, what simplified form is it equal to?

Explanation opens after your attempt
Correct Answer

A. \(3\sqrt{7}\)

Step 1

Concept

\( \sqrt{63}=\sqrt{9\times 7}=3\sqrt{7} \). Identify the largest perfect square first.

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{7}\). \( \sqrt{63}=\sqrt{9\times 7}=3\sqrt{7} \). Identify the largest perfect square first.

Step 3

Exam Tip

\( \sqrt{63}=\sqrt{9\times 7}=3\sqrt{7} \) है। पहले सबसे बड़ा पूर्ण वर्ग पहचानें।

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वर्गमूल सर्पिल में \( \sqrt{5} \) और \( \sqrt{13} \) की त्रिज्याओं के वर्गों का अंतर क्या है?

What is the difference between the squares of radii \( \sqrt{5} \) and \( \sqrt{13} \) in the square root spiral?

Explanation opens after your attempt
Correct Answer

C. (8)

Step 1

Concept

The difference of squares is (13-5=8). Squaring square roots gives the number inside.

Step 2

Why this answer is correct

The correct answer is C. (8). The difference of squares is (13-5=8). Squaring square roots gives the number inside.

Step 3

Exam Tip

वर्गों का अंतर (13-5=8) है। वर्गमूलों के वर्ग लेने पर अंदर की संख्या मिलती है।

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यदि \( \sqrt{72} \) सर्पिल में बना है, तो इसे \(a\sqrt{2}\) के रूप में लिखने पर (a) क्या होगा?

If \( \sqrt{72} \) is formed in the spiral, what is (a) when it is written as \(a\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

D. (6)

Step 1

Concept

\( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), so (a=6). Look for a perfect-square factor.

Step 2

Why this answer is correct

The correct answer is D. (6). \( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), so (a=6). Look for a perfect-square factor.

Step 3

Exam Tip

\( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), इसलिए (a=6)। गुणनखंड में पूर्ण वर्ग ढूँढें।

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वर्गमूल सर्पिल में \( \sqrt{n} \) पर अगला चरण \( \sqrt{n+1} \) क्यों बनता है?

Why does the next step after \( \sqrt{n} \) become \( \sqrt{n+1} \) in a square root spiral?

Explanation opens after your attempt
Correct Answer

D. क्योंकि ( \(\sqrt{n}\)2+12=n+1 )Because ( \(\sqrt{n}\)2+12=n+1 )

Step 1

Concept

By Pythagoras, the square of the new hypotenuse is (n+1). Therefore the new hypotenuse is \( \sqrt{n+1} \).

Step 2

Why this answer is correct

The correct answer is D. क्योंकि ( \(\sqrt{n}\)2+12=n+1 ) / Because ( \(\sqrt{n}\)2+12=n+1 ). By Pythagoras, the square of the new hypotenuse is (n+1). Therefore the new hypotenuse is \( \sqrt{n+1} \).

Step 3

Exam Tip

पाइथागोरस प्रमेय से नए कर्ण का वर्ग (n+1) होता है। इसलिए नया कर्ण \( \sqrt{n+1} \) है।

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यदि \( \sqrt{80} \) बिंदु सर्पिल पर है, तो वह किस दो लगातार पूर्णांकों के बीच दूरी पर है?

If the point \( \sqrt{80} \) is on the spiral, between which two consecutive integers is its distance?

Explanation opens after your attempt
Correct Answer

B. (8) और (9)(8) and (9)

Step 1

Concept

Since (64<80<81), \(8<\sqrt{80}<9\). Remembering perfect squares helps in such questions.

Step 2

Why this answer is correct

The correct answer is B. (8) और (9) / (8) and (9). Since (64<80<81), \(8<\sqrt{80}<9\). Remembering perfect squares helps in such questions.

Step 3

Exam Tip

(64<80<81), इसलिए \(8<\sqrt{80}<9\)। पूर्ण वर्गों को याद रखना ऐसे प्रश्नों में मदद करता है।

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किस विकल्प में \( \sqrt{45} \) की सर्पिल दूरी का सही सरलीकरण है?

Which option gives the correct simplification of the spiral distance \( \sqrt{45} \)?

Explanation opens after your attempt
Correct Answer

C. \(3\sqrt{5}\)

Step 1

Concept

\( \sqrt{45}=\sqrt{9\times 5}=3\sqrt{5} \). Extract the largest perfect square (9).

Step 2

Why this answer is correct

The correct answer is C. \(3\sqrt{5}\). \( \sqrt{45}=\sqrt{9\times 5}=3\sqrt{5} \). Extract the largest perfect square (9).

Step 3

Exam Tip

\( \sqrt{45}=\sqrt{9\times 5}=3\sqrt{5} \) है। सबसे बड़ा पूर्ण वर्ग (9) निकालें।

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वर्गमूल सर्पिल में \( \sqrt{99} \) की दूरी किस पूर्णांक के सबसे निकट है?

In the square root spiral, the distance \( \sqrt{99} \) is closest to which integer?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

\( \sqrt{99} \) is slightly less than (10) because (99) is close to (100). Compare with the perfect square (100).

Step 2

Why this answer is correct

The correct answer is C. (10). \( \sqrt{99} \) is slightly less than (10) because (99) is close to (100). Compare with the perfect square (100).

Step 3

Exam Tip

\( \sqrt{99} \) लगभग (10) से थोड़ा कम है क्योंकि (99) संख्या (100) के पास है। पूर्ण वर्ग (100) से तुलना करें।

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यदि \(OP_a=\sqrt{a}\) और \(OP_b=\sqrt{b}\), जहाँ (b=a+5), तो \(OP_b^2-OP_a^2\) कितना होगा?

If \(OP_a=\sqrt{a}\) and \(OP_b=\sqrt{b}\), where (b=a+5), what is \(OP_b^2-OP_a^2\)?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

\(OP_b^2=b\) and \(OP_a^2=a\), so the difference is (b-a=5). Square the lengths to remove square roots.

Step 2

Why this answer is correct

The correct answer is C. (5). \(OP_b^2=b\) and \(OP_a^2=a\), so the difference is (b-a=5). Square the lengths to remove square roots.

Step 3

Exam Tip

\(OP_b^2=b\) और \(OP_a^2=a\), इसलिए अंतर (b-a=5) है। वर्गमूल हटाने के लिए वर्ग लें।

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वर्गमूल सर्पिल में \( \sqrt{28} \) तक पहुँचने के बाद अगली पूर्णांक दूरी कब मिलेगी?

After reaching \( \sqrt{28} \) in the square root spiral, when will the next integer distance occur?

Explanation opens after your attempt
Correct Answer

D. \( \sqrt{36} \) परAt \( \sqrt{36} \)

Step 1

Concept

Integer distances occur at perfect squares, and the next perfect square after (28) is (36). So the next integer distance is at \( \sqrt{36}=6 \).

Step 2

Why this answer is correct

The correct answer is D. \( \sqrt{36} \) पर / At \( \sqrt{36} \). Integer distances occur at perfect squares, and the next perfect square after (28) is (36). So the next integer distance is at \( \sqrt{36}=6 \).

Step 3

Exam Tip

पूर्णांक दूरी पूर्ण वर्गों पर मिलती है और (28) के बाद अगला पूर्ण वर्ग (36) है। इसलिए अगली पूर्णांक दूरी \( \sqrt{36}=6 \) पर मिलेगी।

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किस कथन में \( \sqrt{32} \) की सर्पिल दूरी का सही तुलनात्मक अनुमान है?

Which statement gives the correct comparative estimate of the spiral distance \( \sqrt{32} \)?

Explanation opens after your attempt
Correct Answer

B. यह (5) और (6) के बीच हैIt is between (5) and (6)

Step 1

Concept

Because (25<32<36), \(5<\sqrt{32}<6\). Always compare with nearby perfect squares.

Step 2

Why this answer is correct

The correct answer is B. यह (5) और (6) के बीच है / It is between (5) and (6). Because (25<32<36), \(5<\sqrt{32}<6\). Always compare with nearby perfect squares.

Step 3

Exam Tip

क्योंकि (25<32<36), इसलिए \(5<\sqrt{32}<6\)। हमेशा नजदीकी पूर्ण वर्गों से तुलना करें।

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यदि \( \sqrt{7} \) वाले बिंदु से बनी नई इकाई भुजा पर कर्ण \( \sqrt{8} \) मिलता है, तो यह किस प्रमेय पर आधारित है?

If a new unit side from the \( \sqrt{7} \) point gives hypotenuse \( \sqrt{8} \), which theorem is this based on?

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Correct Answer

C. पाइथागोरस प्रमेयPythagoras theorem

Step 1

Concept

In the right triangle, ( \(\sqrt{7}\)2+12=8 ). This is a direct use of Pythagoras theorem.

Step 2

Why this answer is correct

The correct answer is C. पाइथागोरस प्रमेय / Pythagoras theorem. In the right triangle, ( \(\sqrt{7}\)2+12=8 ). This is a direct use of Pythagoras theorem.

Step 3

Exam Tip

समकोण त्रिभुज में ( \(\sqrt{7}\)2+12=8 ) होता है। यह सीधे पाइथागोरस प्रमेय का प्रयोग है।

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वर्गमूल सर्पिल में \( \sqrt{2} \), \( \sqrt{5} \), \( \sqrt{10} \), \( \sqrt{17} \) में कौन-सी दूरी पूर्णांक के सबसे निकट है?

Among \( \sqrt{2} \), \( \sqrt{5} \), \( \sqrt{10} \), \( \sqrt{17} \), which distance is closest to an integer?

Explanation opens after your attempt
Correct Answer

D. \( \sqrt{17} \)

Step 1

Concept

\( \sqrt{17} \) is close to (4) because (17) is only (1) more than (16). Look for the number closest to a perfect square.

Step 2

Why this answer is correct

The correct answer is D. \( \sqrt{17} \). \( \sqrt{17} \) is close to (4) because (17) is only (1) more than (16). Look for the number closest to a perfect square.

Step 3

Exam Tip

\( \sqrt{17} \) संख्या (4) के पास है क्योंकि (17), (16) से केवल (1) अधिक है। पूर्ण वर्ग के सबसे नजदीक संख्या देखें।

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किस विकल्प में वर्गमूल सर्पिल में लगातार तीन त्रिज्याओं के वर्गों का सही क्रम है?

Which option gives the correct order of squares of three consecutive radii in the square root spiral?

Explanation opens after your attempt
Correct Answer

A. (n,n+1,n+2)

Step 1

Concept

Consecutive radii are \( \sqrt{n} \), \( \sqrt{n+1} \), and \( \sqrt{n+2} \). Their squares are (n,n+1,n+2).

Step 2

Why this answer is correct

The correct answer is A. (n,n+1,n+2). Consecutive radii are \( \sqrt{n} \), \( \sqrt{n+1} \), and \( \sqrt{n+2} \). Their squares are (n,n+1,n+2).

Step 3

Exam Tip

लगातार त्रिज्याएँ \( \sqrt{n} \), \( \sqrt{n+1} \), \( \sqrt{n+2} \) होती हैं। इनके वर्ग (n,n+1,n+2) हैं।

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वर्गमूल सर्पिल में \( \sqrt{108} \) की दूरी का सबसे सरल रूप कौन-सा है?

What is the simplest form of the distance \( \sqrt{108} \) in the square root spiral?

Explanation opens after your attempt
Correct Answer

B. \(6\sqrt{3}\)

Step 1

Concept

\( \sqrt{108}=\sqrt{36\times 3}=6\sqrt{3} \). Choose the largest perfect square (36).

Step 2

Why this answer is correct

The correct answer is B. \(6\sqrt{3}\). \( \sqrt{108}=\sqrt{36\times 3}=6\sqrt{3} \). Choose the largest perfect square (36).

Step 3

Exam Tip

\( \sqrt{108}=\sqrt{36\times 3}=6\sqrt{3} \) है। सबसे बड़ा पूर्ण वर्ग (36) चुनें।

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यदि सर्पिल में \( \sqrt{120} \) तक बिंदु बने हैं, तो \( \sqrt{121} \) बनाने के बाद दूरी क्या होगी?

If points are constructed up to \( \sqrt{120} \) in the spiral, what will the distance be after constructing \( \sqrt{121} \)?

Explanation opens after your attempt
Correct Answer

B. (11)

Step 1

Concept

\( \sqrt{121}=11 \), so the distance will be (11) units. A perfect square gives an integer square root.

Step 2

Why this answer is correct

The correct answer is B. (11). \( \sqrt{121}=11 \), so the distance will be (11) units. A perfect square gives an integer square root.

Step 3

Exam Tip

\( \sqrt{121}=11 \), इसलिए दूरी (11) इकाई होगी। पूर्ण वर्ग आने पर वर्गमूल पूर्णांक बन जाता है।

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Class 9 Mathematics Quiz FAQs

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