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100 results found for "multiple equations" in Class 10.

निम्न में से कौन सा समीकरण द्विघात समीकरण है?

Which of the following equations is a quadratic equation?

Explanation opens after your attempt
Correct Answer

A. \(x^2+3x+2=0\)

Step 1

Concept

A quadratic equation has highest power (2) of (x). In exams first check the degree.

Step 2

Why this answer is correct

The correct answer is A. \(x^2+3x+2=0\). A quadratic equation has highest power (2) of (x). In exams first check the degree.

Step 3

Exam Tip

द्विघात समीकरण में (x) की सबसे बड़ी घात (2) होती है। परीक्षा में सबसे पहले घात देखें।

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कौन-सी संख्या \(2^6\times3\times5\) और \(2^4\times3^3\times7\) दोनों की गुणज अवश्य होगी?

Which number will surely be a multiple of both \(2^6\times3\times5\) and \(2^4\times3^3\times7\)?

Explanation opens after your attempt
Correct Answer

A. \(2^6\times3^3\times5\times7\)

Step 1

Concept

A common multiple must contain all prime powers required by both numbers.

Step 2

Why this answer is correct

The highest powers are \(2^6\), \(3^3\), (5), and (7).

Step 3

Exam Tip

Do not miss any required prime factor while checking a multiple. चरण 1: दोनों की गुणज संख्या में दोनों संख्याओं के लिए जरूरी सभी अभाज्य घातें होनी चाहिए। चरण 2: बड़ी घातें \(2^6\), \(3^3\), (5) और (7) हैं। चरण 3: गुणज जाँचते समय कोई आवश्यक अभाज्य गुणनखंड न छोड़ें।

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कौन-सी संख्या \(2^4\times3^2\) और \(2^2\times3^3\times5\) दोनों की गुणज अवश्य होगी?

Which number will surely be a multiple of both \(2^4\times3^2\) and \(2^2\times3^3\times5\)?

Explanation opens after your attempt
Correct Answer

A. \(2^4\times3^3\times5\)

Step 1

Concept

A common multiple must contain all required prime powers of both numbers.

Step 2

Why this answer is correct

The required highest powers are \(2^4\), \(3^3\), and (5).

Step 3

Exam Tip

Do not miss any required prime factor while checking a multiple. चरण 1: दोनों की गुणज संख्या में दोनों संख्याओं के लिए जरूरी सभी अभाज्य घातें होनी चाहिए। चरण 2: आवश्यक बड़ी घातें \(2^4\), \(3^3\) और (5) हैं। चरण 3: गुणज की जाँच में कोई आवश्यक अभाज्य छूटना नहीं चाहिए।

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कौन-सी संख्या \(2^5\times3^2\times5\) और \(2^3\times3^4\times7\) दोनों की गुणज होगी?

Which number will be a multiple of both \(2^5\times3^2\times5\) and \(2^3\times3^4\times7\)?

Explanation opens after your attempt
Correct Answer

A. \(2^5\times3^4\times5\times7\)

Step 1

Concept

A common multiple must be a multiple of the LCM.

Step 2

Why this answer is correct

The LCM contains \(2^5\), \(3^4\), (5), and (7).

Step 3

Exam Tip

For a multiple, every required prime power must be present. चरण 1: दोनों की गुणज संख्या उनके लघुत्तम समापवर्त्य की भी गुणज होगी। चरण 2: लघुत्तम समापवर्त्य में \(2^5\), \(3^4\), (5) और (7) आएँगे। चरण 3: गुणज जाँचते समय हर आवश्यक अभाज्य घात मौजूद होनी चाहिए।

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\(3^3 \times 7\) का सबसे छोटा सम गुणज कौन सा होगा?

What will be the smallest even multiple of \(3^3 \times 7\)?

Explanation opens after your attempt
Correct Answer

B. \(2 \times 3^3 \times 7\)

Step 1

Concept

The given number has no (2), so it is odd.

Step 2

Why this answer is correct

Multiplying by just one (2) gives the smallest even multiple.

Step 3

Exam Tip

When the smallest multiple is asked, do not increase exponents unnecessarily. चरण 1: दी गई संख्या में (2) नहीं है, इसलिए वह विषम है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटा गुणज पूछे जाने पर अनावश्यक घात न बढ़ाएं।

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\(3^2 \times 5 \times 7\) का सबसे छोटा सम गुणज कौन सा होगा?

What will be the smallest even multiple of \(3^2 \times 5 \times 7\)?

Explanation opens after your attempt
Correct Answer

B. \(2 \times 3^2 \times 5 \times 7\)

Step 1

Concept

The given number has no (2), so it is odd.

Step 2

Why this answer is correct

To make the smallest even multiple, multiplying by one (2) is enough.

Step 3

Exam Tip

When the smallest multiple is asked, do not increase exponents unnecessarily. चरण 1: दी गई संख्या में (2) नहीं है, इसलिए वह विषम है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटा गुणज पूछे जाने पर अनावश्यक घात न बढ़ाएं।

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यदि \(N=2^2 \times 3^5\), तो (N) का सबसे छोटा पूर्ण घन गुणज कौन सा है?

If \(N=2^2 \times 3^5\), what is the smallest perfect-cube multiple of (N)?

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Correct Answer

A. \(2^3 \times 3^6\)

Step 1

Concept

In a perfect cube, exponents must be multiples of (3).

Step 2

Why this answer is correct

\(2^2\) must become \(2^3\), and \(3^5\) must become \(3^6\).

Step 3

Exam Tip

For the smallest cube multiple, move each exponent to the next multiple of (3). चरण 1: पूर्ण घन में घातें (3) की गुणज होनी चाहिए। चरण 2: \(2^2\) को \(2^3\) और \(3^5\) को \(3^6\) बनाना होगा। चरण 3: सबसे छोटा पूर्ण घन गुणज पाने के लिए अगली (3) की गुणज घात लें।

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यदि \(N=2^3 \times 3^2 \times 5\), तो (N) का सबसे छोटा पूर्ण वर्ग गुणज कौन सा है?

If \(N=2^3 \times 3^2 \times 5\), what is the smallest perfect-square multiple of (N)?

Explanation opens after your attempt
Correct Answer

A. \(2^4 \times 3^2 \times 5^2\)

Step 1

Concept

In a perfect square, all exponents must be even.

Step 2

Why this answer is correct

Make \(2^3\) into \(2^4\) and (5) into \(5^2\); \(3^2\) is already fine.

Step 3

Exam Tip

For the smallest square multiple, increase only the necessary exponents. चरण 1: पूर्ण वर्ग में सभी घातें सम होनी चाहिए। चरण 2: \(2^3\) को \(2^4\) और (5) को \(5^2\) बनाना होगा; \(3^2\) पहले से सही है। चरण 3: सबसे छोटे पूर्ण वर्ग गुणज में केवल जरूरी घातें ही बढ़ाएं।

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\(3^2 \times 5^2 \times 7\) का सबसे छोटा सम गुणज कौन सा है?

What is the smallest even multiple of \(3^2 \times 5^2 \times 7\)?

Explanation opens after your attempt
Correct Answer

A. \(2 \times 3^2 \times 5^2 \times 7\)

Step 1

Concept

The given number is odd because it has no factor (2).

Step 2

Why this answer is correct

To make the smallest even multiple, multiply by only one (2).

Step 3

Exam Tip

Do not increase exponents unnecessarily when the smallest value is asked. चरण 1: दी गई संख्या विषम है क्योंकि इसमें (2) नहीं है। चरण 2: सबसे छोटा सम गुणज बनाने के लिए केवल एक (2) गुणा करना पर्याप्त है। चरण 3: सबसे छोटी शर्त पूरी करने के लिए अनावश्यक घात न बढ़ाएं।

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यदि \(63=7 \times 9+0\) है तो (63) किसका गुणज है?

If \(63=7 \times 9+0\), then (63) is a multiple of which number?

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Correct Answer

A. (7)

Step 1

Concept

In \(63=7 \times 9+0\), the remainder is (0).

Step 2

Why this answer is correct

This means (63) is exactly divisible by (7).

Step 3

Exam Tip

In zero-remainder questions, identify the multiple directly. चरण 1: \(63=7 \times 9+0\) में शेषफल (0) है। चरण 2: इसका अर्थ है (63), (7) से पूर्णतः विभाजित होता है। चरण 3: शून्य शेषफल वाले प्रश्नों में गुणज पहचानना आसान होता है।

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बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बनना किस मुख्य घटना पर निर्भर करता है?

Formation of many daughter cells from one cell in multiple fission depends mainly on which event?

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Correct Answer

B. केंद्रक के बार बार विभाजन और बाद में कोशिका द्रव्य के विभाजन परRepeated nuclear division followed by cytoplasmic division

Step 1

Concept

In multiple fission genetic material can divide many times first.

Step 2

Why this answer is correct

Cytoplasm later divides around these parts.

Step 3

Exam Tip

This forms many daughter cells. चरण 1: बहुखंडन में पहले आनुवंशिक पदार्थ कई भागों में बंट सकता है। चरण 2: बाद में कोशिका द्रव्य उन भागों के चारों ओर बंटता है। चरण 3: इससे कई संतति कोशिकाएं बनती हैं।

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बहुखंडन में एक कोशिका से अनेक संतति बनना किस स्थिति में अधिक उपयोगी हो सकता है?

In which situation can production of many offspring from one cell by multiple fission be more useful?

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Correct Answer

A. जब प्रतिकूल दशा के बाद अनुकूल दशा अचानक मिल जाएWhen favorable conditions suddenly return after unfavorable conditions

Step 1

Concept

Some microorganisms can form a protected stage in difficult conditions.

Step 2

Why this answer is correct

Repeated divisions can occur inside it.

Step 3

Exam Tip

When conditions become favorable, many offspring can emerge together. चरण 1: कुछ सूक्ष्म जीव कठिन दशा में सुरक्षित अवस्था बना सकते हैं। चरण 2: उसके भीतर बार बार विभाजन हो सकता है। चरण 3: अनुकूल दशा मिलने पर कई संतति एक साथ निकल सकती हैं।

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बहुखंडन में सुरक्षा आवरण का महत्व क्या है?

What is the importance of a protective covering in multiple fission?

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Correct Answer

A. यह प्रतिकूल दशा में कोशिका की रक्षा कर सकता हैIt can protect the cell in unfavorable conditions

Step 1

Concept

Some microorganisms form a protective covering in difficult conditions.

Step 2

Why this answer is correct

The nucleus may divide many times inside it.

Step 3

Exam Tip

When conditions become favorable, many offspring may come out. चरण 1: कुछ सूक्ष्म जीव कठिन दशा में सुरक्षा आवरण बना लेते हैं। चरण 2: आवरण के भीतर केंद्रक कई बार विभाजित हो सकता है। चरण 3: अनुकूल दशा आने पर कई संततियाँ बाहर निकल सकती हैं।

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बहुखंडन कठिन दशाओं में कुछ एककोशिकीय जीवों के लिए कैसे लाभकारी हो सकता है?

How can multiple fission be useful for some unicellular organisms in difficult conditions?

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Correct Answer

A. सुरक्षित अवस्था में कई संतति कोशिकाएं बन सकती हैंMany daughter cells can form in a protected state

Step 1

Concept

Some unicellular organisms can form a covering in unfavourable conditions.

Step 2

Why this answer is correct

Repeated division inside forms many cells.

Step 3

Exam Tip

They can come out when conditions become favourable. चरण 1: कुछ एककोशिकीय जीव प्रतिकूल दशा में अपने चारों ओर आवरण बना सकते हैं। चरण 2: अंदर बार बार विभाजन होकर कई कोशिकाएं बनती हैं। चरण 3: अनुकूल दशा आने पर वे बाहर निकल सकती हैं।

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द्विखंडन और बहुखंडन का सही भेद किस आधार पर किया जाता है?

On what basis is binary fission correctly distinguished from multiple fission?

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Correct Answer

A. संतान कोशिकाओं की संख्या के आधार परOn the basis of number of daughter cells

Step 1

Concept

In binary fission one cell usually divides into two parts.

Step 2

Why this answer is correct

In multiple fission one cell can form many daughter cells.

Step 3

Exam Tip

Therefore the main difference is the number produced. चरण 1: द्विखंडन में एक कोशिका सामान्य रूप से दो भागों में बंटती है। चरण 2: बहुखंडन में एक कोशिका से अनेक संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए दोनों में संख्या का अंतर मुख्य है।

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द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

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Correct Answer

A. द्विखंडन में दो संतति बनती हैं और बहुखंडन में अनेक संतति बनती हैंBinary fission forms two offspring and multiple fission forms many offspring

Step 1

Concept

In binary fission one cell divides into two.

Step 2

Why this answer is correct

In multiple fission one cell can form many new cells.

Step 3

Exam Tip

So the main difference is the number of offspring formed. चरण 1: द्विखंडन में एक कोशिका दो भागों में बँटती है। चरण 2: बहुखंडन में एक कोशिका से कई नई कोशिकाएँ बन सकती हैं। चरण 3: इसलिए दोनों में संतति की संख्या का अंतर मुख्य है।

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द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

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Correct Answer

A. द्विखंडन में दो और बहुखंडन में अनेक संतति कोशिकाएं बनती हैंBinary fission forms two and multiple fission forms many daughter cells

Step 1

Concept

Binary fission means division into two parts.

Step 2

Why this answer is correct

Multiple fission can form many daughter cells from one cell.

Step 3

Exam Tip

Remember the difference by number of offspring cells. चरण 1: द्विखंडन का अर्थ दो भागों में विभाजन है। चरण 2: बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए संख्या के आधार पर अंतर याद रखें।

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द्विखंडन और बहुखंडन में मुख्य अंतर क्या है?

What is the main difference between binary fission and multiple fission?

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Correct Answer

A. द्विखंडन में दो संतानें और बहुखंडन में अनेक संतानें बन सकती हैंBinary fission forms two offspring while multiple fission can form many offspring

Step 1

Concept

In binary fission one cell divides into two.

Step 2

Why this answer is correct

In multiple fission one cell can produce many daughter cells.

Step 3

Exam Tip

Remember the difference by the number of offspring formed. चरण 1: द्विखंडन में एक कोशिका दो भागों में बंटती है। चरण 2: बहुखंडन में एक कोशिका से कई संतति कोशिकाएं बन सकती हैं। चरण 3: इसलिए संख्या के आधार पर दोनों में अंतर याद रखें।

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समीकरण (2x-3y=4) और (4x-6y=8) में कौन-सा संबंध है?

What relationship exists between (2x-3y=4) and (4x-6y=8)?

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Correct Answer

A. दूसरा पहले का (2) गुना हैThe second is (2) times the first

Step 1

Concept

All terms of the second equation are (2) times the first. Hence, both are the same line and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is A. दूसरा पहले का (2) गुना है / The second is (2) times the first. All terms of the second equation are (2) times the first. Hence, both are the same line and have infinitely many solutions.

Step 3

Exam Tip

दूसरे समीकरण के सभी पद पहले के (2) गुना हैं। इसलिए दोनों एक ही रेखा हैं और अनंत हल हैं।

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समीकरणों (6x+3y=39) और (2x+y=13) के बारे में सही कथन कौन-सा है?

Which statement is correct about the equations (6x+3y=39) and (2x+y=13)?

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Correct Answer

D. पहला समीकरण दूसरे का (3) गुना हैThe first equation is (3) times the second

Step 1

Concept

Multiplying (2x+y=13) by (3) gives (6x+3y=39). Recognizing equivalent equations is also useful in exams.

Step 2

Why this answer is correct

The correct answer is D. पहला समीकरण दूसरे का (3) गुना है / The first equation is (3) times the second. Multiplying (2x+y=13) by (3) gives (6x+3y=39). Recognizing equivalent equations is also useful in exams.

Step 3

Exam Tip

(2x+y=13) को (3) से गुणा करने पर (6x+3y=39) मिलता है। समान समीकरणों को पहचानना भी परीक्षा में उपयोगी है।

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यदि (2x+4y=18) और (x+2y=9), तो इन दोनों समीकरणों के बारे में सही कथन क्या है?

If (2x+4y=18) and (x+2y=9), which statement is correct about these two equations?

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Correct Answer

B. पहला समीकरण दूसरे का (2) गुना हैThe first equation is (2) times the second

Step 1

Concept

The first equation is (2(x+2y)=18), so it is (2) times the second. Recognizing proportional equations is also important.

Step 2

Why this answer is correct

The correct answer is B. पहला समीकरण दूसरे का (2) गुना है / The first equation is (2) times the second. The first equation is (2(x+2y)=18), so it is (2) times the second. Recognizing proportional equations is also important.

Step 3

Exam Tip

पहला समीकरण (2(x+2y)=18) है, इसलिए यह दूसरे का (2) गुना है। समानुपाती समीकरणों को पहचानना भी जरूरी है।

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समीकरण (8x-4y=12) और (2x-y=3) में कौन-सा संबंध है?

What relationship exists between (8x-4y=12) and (2x-y=3)?

Explanation opens after your attempt
Correct Answer

A. पहला दूसरे का (4) गुना हैThe first is (4) times the second

Step 1

Concept

Multiplying (2x-y=3) by (4) gives (8x-4y=12). Therefore there are infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is A. पहला दूसरे का (4) गुना है / The first is (4) times the second. Multiplying (2x-y=3) by (4) gives (8x-4y=12). Therefore there are infinitely many solutions.

Step 3

Exam Tip

(2x-y=3) को (4) से गुणा करने पर (8x-4y=12) मिलता है। इसलिए अनंत हल हैं।

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यदि (x=3y) और (x+y=16), तो (x) और (y) के मान क्या हैं?

If (x=3y) and (x+y=16), what are the values of (x) and (y)?

Explanation opens after your attempt
Correct Answer

C. (x=12,\ y=4)

Step 1

Concept

Substituting (x=3y) gives (4y=16), so (y=4) and (x=12). Substitution is fast when one variable is a multiple of another.

Step 2

Why this answer is correct

The correct answer is C. (x=12,\ y=4). Substituting (x=3y) gives (4y=16), so (y=4) and (x=12). Substitution is fast when one variable is a multiple of another.

Step 3

Exam Tip

(x=3y) रखने पर (4y=16), इसलिए (y=4) और (x=12)। गुणज वाले रूप में प्रतिस्थापन तेज होता है।

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समीकरण (y=3x) और (x+y=16) का हल कौन-सा है?

Which is the solution of (y=3x) and (x+y=16)?

Explanation opens after your attempt
Correct Answer

B. ( (4,12) )

Step 1

Concept

Putting (y=3x) gives (4x=16), so (x=4) and (y=12). Substitution is fast when one variable is a multiple of the other.

Step 2

Why this answer is correct

The correct answer is B. ( (4,12) ). Putting (y=3x) gives (4x=16), so (x=4) and (y=12). Substitution is fast when one variable is a multiple of the other.

Step 3

Exam Tip

(y=3x) रखने पर (4x=16), इसलिए (x=4) और (y=12)। अनुपात वाले समीकरण में प्रतिस्थापन तेज होता है।

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यदि (D=0), \(D_x=0\) और \(D_y=0\) हैं, तो दो रैखिक समीकरणों के युग्म में क्या होगा?

If (D=0), \(D_x=0\), and \(D_y=0\), what happens in a pair of two linear equations?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

When all three determinants are zero, the equations may be dependent. In Class (10), link this with infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. When all three determinants are zero, the equations may be dependent. In Class (10), link this with infinitely many solutions.

Step 3

Exam Tip

तीनों सारणिक शून्य होने पर समीकरण आश्रित हो सकते हैं। कक्षा (10) में इसे अनंत हल की स्थिति से जोड़कर देखें।

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समीकरणों (21x+8y=97) और (42x+16y=194) को देखकर कौन-सा कथन सही है?

Which statement is correct by observing the equations (21x+8y=97) and (42x+16y=194)?

Explanation opens after your attempt
Correct Answer

B. रेखाएं एक ही हैंLines are the same

Step 1

Concept

The second equation is (2) times the first. Therefore, both lines are the same and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is B. रेखाएं एक ही हैं / Lines are the same. The second equation is (2) times the first. Therefore, both lines are the same and have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है। इसलिए दोनों रेखाएं एक ही हैं और अनंत हल हैं।

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दो वस्तुओं की कीमतों के लिए (10x+3y=470) और (20x+6y=955) समीकरण बने। यह प्रणाली कैसी है?

For prices of two items, the equations (10x+3y=470) and (20x+6y=955) are formed. What type of system is this?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

The first two ratios are equal but (470/955) is different. Therefore, the system is inconsistent.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. The first two ratios are equal but (470/955) is different. Therefore, the system is inconsistent.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन (470/955) अलग है। इसलिए प्रणाली असंगत है।

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समीकरणों (7x+19y=86) और (13x+35y=158) में (a) और (b) के अनुपातों की तुलना से क्या निष्कर्ष निकलेगा?

What conclusion follows from comparing the ratios of (a) and (b) in the equations (7x+19y=86) and (13x+35y=158)?

Explanation opens after your attempt
Correct Answer

C. (713 \ne 19 / 35), इसलिए एक अद्वितीय हल / 35), so one unique solution

Step 1

Concept

The first two ratios are different. Therefore, the lines intersect at one point and give one unique solution.

Step 2

Why this answer is correct

The correct answer is C. \(7 / 13 \ne 19 / 35\), इसलिए एक अद्वितीय हल / 35), so one unique solution. The first two ratios are different. Therefore, the lines intersect at one point and give one unique solution.

Step 3

Exam Tip

पहले दो अनुपात अलग हैं। इसलिए रेखाएं एक बिंदु पर कटती हैं और एक अद्वितीय हल देती हैं।

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समीकरणों (12x-7y+29=0) और (36x-21y+91=0) के लिए सही हल-स्थिति क्या है?

What is the correct solution status for the equations (12x-7y+29=0) and (36x-21y+91=0)?

Explanation opens after your attempt
Correct Answer

C. कोई हल नहींNo solution

Step 1

Concept

Here (12/36=(-7)/(-21)) but (29/91) is different. Therefore, the lines are parallel and distinct.

Step 2

Why this answer is correct

The correct answer is C. कोई हल नहीं / No solution. Here (12/36=(-7)/(-21)) but (29/91) is different. Therefore, the lines are parallel and distinct.

Step 3

Exam Tip

यहां (12/36=(-7)/(-21)) लेकिन (29/91) अलग है। इसलिए रेखाएं समानांतर और अलग हैं।

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समीकरणों (11x+ky=70) और (5x+4y=31) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (11x+ky=70) and (5x+4y=31) to have a unique solution?

Explanation opens after your attempt
Correct Answer

B. (k\ne445)

Step 1

Concept

For a unique solution, \(11/5 \ne k/4\) must hold. Therefore, \(k\ne44/5\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is B. \(k\ne44 / 5\). For a unique solution, \(11/5 \ne k/4\) must hold. Therefore, \(k\ne44/5\) is the correct condition.

Step 3

Exam Tip

अद्वितीय हल के लिए \(11/5 \ne k/4\) होना चाहिए। इसलिए \(k\ne44/5\) सही शर्त है।

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समीकरणों (px+10y=50) और (14x+35y=122) का कोई हल न होने के लिए (p) का मान क्या होगा?

What is the value of (p) for the equations (px+10y=50) and (14x+35y=122) to have no solution?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

For no solution, (p/14=10/35) and (50/122) must be different. Therefore, (p=4).

Step 2

Why this answer is correct

The correct answer is B. (4). For no solution, (p/14=10/35) and (50/122) must be different. Therefore, (p=4).

Step 3

Exam Tip

कोई हल नहीं के लिए (p/14=10/35) और (50/122) अलग होना चाहिए। इसलिए (p=4)।

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समीकरणों (6x+ay=42) और (18x+33y=126) के अनंत हल होने के लिए (a) का मान क्या होगा?

What is the value of (a) for the equations (6x+ay=42) and (18x+33y=126) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (11)

Step 1

Concept

For infinitely many solutions, (6/18=a/33=42/126) must hold. Therefore, (a=11) is correct.

Step 2

Why this answer is correct

The correct answer is C. (11). For infinitely many solutions, (6/18=a/33=42/126) must hold. Therefore, (a=11) is correct.

Step 3

Exam Tip

अनंत हल के लिए (6/18=a/33=42/126) होना चाहिए। इसलिए (a=11) सही है।

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समीकरणों (5x+9y=64) और (15x+27y=t) के असंगत होने के लिए (t) के लिए सही शर्त क्या है?

What is the correct condition on (t) for the equations (5x+9y=64) and (15x+27y=t) to be inconsistent?

Explanation opens after your attempt
Correct Answer

B. \(t\ne192\)

Step 1

Concept

The first two ratios are equal. For inconsistency, the constant ratio must be different so \(t\ne192\).

Step 2

Why this answer is correct

The correct answer is B. \(t\ne192\). The first two ratios are equal. For inconsistency, the constant ratio must be different so \(t\ne192\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं। असंगत होने के लिए स्थिर पद का अनुपात अलग होना चाहिए इसलिए \(t\ne192\)।

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यदि \(\frac{a_1}{a_2}\neq\frac{b_1}{b_2}\) है, तो दो रैखिक समीकरणों के युग्म के लिए क्या निष्कर्ष होगा?

If \(\frac{a_1}{a_2}\neq\frac{b_1}{b_2}\), what is the conclusion for a pair of two linear equations?

Explanation opens after your attempt
Correct Answer

C. अद्वितीय हलUnique solution

Step 1

Concept

When coefficient ratios are different, the lines intersect at one point. Therefore, a unique solution is obtained.

Step 2

Why this answer is correct

The correct answer is C. अद्वितीय हल / Unique solution. When coefficient ratios are different, the lines intersect at one point. Therefore, a unique solution is obtained.

Step 3

Exam Tip

गुणांक अनुपात अलग होने पर रेखाएँ एक बिंदु पर कटती हैं। इसलिए अद्वितीय हल मिलता है।

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समीकरणों (29x+12y=101) और (14x+6y=49) के लिए सही हल-स्थिति क्या है?

What is the correct solution status for the equations (29x+12y=101) and (14x+6y=49)?

Explanation opens after your attempt
Correct Answer

C. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here \(29/14 \ne 12/6\), so the lines will intersect. Hence, there is one unique solution.

Step 2

Why this answer is correct

The correct answer is C. एक अद्वितीय हल / One unique solution. Here \(29/14 \ne 12/6\), so the lines will intersect. Hence, there is one unique solution.

Step 3

Exam Tip

यहां \(29/14 \ne 12/6\), इसलिए रेखाएं कटेंगी। अतः एक अद्वितीय हल है।

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समीकरणों (24x-18y=102) और (4x-3y=18) को देखकर सही निष्कर्ष क्या है?

What is the correct conclusion by observing the equations (24x-18y=102) and (4x-3y=18)?

Explanation opens after your attempt
Correct Answer

A. कोई हल नहींNo solution

Step 1

Concept

Here (24/4=(-18)/(-3)) but (102/18) is different. Therefore, the lines are parallel and distinct.

Step 2

Why this answer is correct

The correct answer is A. कोई हल नहीं / No solution. Here (24/4=(-18)/(-3)) but (102/18) is different. Therefore, the lines are parallel and distinct.

Step 3

Exam Tip

यहां (24/4=(-18)/(-3)) लेकिन (102/18) अलग है। इसलिए रेखाएं समानांतर और अलग हैं।

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समीकरणों (18x+13y=89) और (36x+26y=178) को देखकर कौन-सा कथन सही है?

Which statement is correct by observing the equations (18x+13y=89) and (36x+26y=178)?

Explanation opens after your attempt
Correct Answer

B. रेखाएं एक ही हैंLines are the same

Step 1

Concept

The second equation is (2) times the first. Therefore, both lines are the same.

Step 2

Why this answer is correct

The correct answer is B. रेखाएं एक ही हैं / Lines are the same. The second equation is (2) times the first. Therefore, both lines are the same.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है। इसलिए दोनों रेखाएं एक ही हैं।

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समीकरणों (12x+ky=132) और (3x+10y=33) के अनंत हल होने के लिए (k) क्या होगा?

What will (k) be for the equations (12x+ky=132) and (3x+10y=33) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (40)

Step 1

Concept

The first equation must be (4) times the second. Therefore, (k=40).

Step 2

Why this answer is correct

The correct answer is C. (40). The first equation must be (4) times the second. Therefore, (k=40).

Step 3

Exam Tip

पहला समीकरण दूसरे का (4) गुना होना चाहिए। इसलिए (k=40) है।

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समीकरणों (10x+9y=38) और (20x+ay=91) का कोई हल न होने के लिए (a) क्या होगा?

What will (a) be for the equations (10x+9y=38) and (20x+ay=91) to have no solution?

Explanation opens after your attempt
Correct Answer

C. (18)

Step 1

Concept

For no solution, (10/20=9/a) and (38/91) must be different. This gives (a=18).

Step 2

Why this answer is correct

The correct answer is C. (18). For no solution, (10/20=9/a) and (38/91) must be different. This gives (a=18).

Step 3

Exam Tip

कोई हल नहीं के लिए (10/20=9/a) और (38/91) अलग होना चाहिए। इससे (a=18) मिलता है।

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समीकरणों (13x+8y=49) और (26x+16y=r) के असंगत होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (13x+8y=49) and (26x+16y=r) to be inconsistent?

Explanation opens after your attempt
Correct Answer

B. \(r\ne98\)

Step 1

Concept

The first two ratios are equal. For inconsistency, the constant ratio must be different so \(r\ne98\).

Step 2

Why this answer is correct

The correct answer is B. \(r\ne98\). The first two ratios are equal. For inconsistency, the constant ratio must be different so \(r\ne98\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं। असंगत होने के लिए स्थिर पद का अनुपात अलग होना चाहिए इसलिए \(r\ne98\)।

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समीकरणों (9x+16y=77) और (27x+48y=s) के संगत और आश्रित होने के लिए (s) क्या होगा?

What should (s) be for the equations (9x+16y=77) and (27x+48y=s) to be consistent and dependent?

Explanation opens after your attempt
Correct Answer

C. (231)

Step 1

Concept

To be consistent and dependent, the second equation must be (3) times the first. Hence, (s=231).

Step 2

Why this answer is correct

The correct answer is C. (231). To be consistent and dependent, the second equation must be (3) times the first. Hence, (s=231).

Step 3

Exam Tip

संगत और आश्रित होने के लिए दूसरा समीकरण पहले का (3) गुना होना चाहिए। अतः (s=231)।

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समीकरणों (12x+13y=55) और (24x+25y=107) के लिए कौन-सा कथन सही है?

Which statement is correct for the equations (12x+13y=55) and (24x+25y=107)?

Explanation opens after your attempt
Correct Answer

B. (1224 \ne 13 / 25), इसलिए एक अद्वितीय हल / 25), so one unique solution

Step 1

Concept

Here \(12/24 \ne 13/25\), so the lines intersect. Therefore, there is one unique solution.

Step 2

Why this answer is correct

The correct answer is B. \(12 / 24 \ne 13 / 25\), इसलिए एक अद्वितीय हल / 25), so one unique solution. Here \(12/24 \ne 13/25\), so the lines intersect. Therefore, there is one unique solution.

Step 3

Exam Tip

यहां \(12/24 \ne 13/25\), इसलिए रेखाएं कटती हैं। इस कारण एक अद्वितीय हल है।

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समीकरणों (18x+27y=126) और (2x+3y=16) के लिए कौन-सा संबंध सही है?

Which relation is correct for the equations (18x+27y=126) and (2x+3y=16)?

Explanation opens after your attempt
Correct Answer

C. (182=27 / 3 \ne 126 / 16)

Step 1

Concept

The first two ratios are equal but the constant ratio is different. Therefore, there is no solution.

Step 2

Why this answer is correct

The correct answer is C. \(18 / 2=27 / 3 \ne 126 / 16\). The first two ratios are equal but the constant ratio is different. Therefore, there is no solution.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग है। इसलिए कोई हल नहीं है।

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समीकरणों (11x+18y=86) और (33x+54y=258) में तीनों अनुपातों का संबंध क्या है?

What is the relation among all three ratios in the equations (11x+18y=86) and (33x+54y=258)?

Explanation opens after your attempt
Correct Answer

A. तीनों बराबर हैंAll three are equal

Step 1

Concept

Here (11/33=18/54=86/258). Therefore, both equations form the same line.

Step 2

Why this answer is correct

The correct answer is A. तीनों बराबर हैं / All three are equal. Here (11/33=18/54=86/258). Therefore, both equations form the same line.

Step 3

Exam Tip

यहां (11/33=18/54=86/258)। इसलिए दोनों समीकरण एक ही रेखा बनाते हैं।

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दो संख्याओं के लिए (7x+5y=58) और (4x-3y=11) समीकरण बनते हैं, तो हल-स्थिति क्या होगी?

For two numbers, the equations (7x+5y=58) and (4x-3y=11) are formed. What will be the solution status?

Explanation opens after your attempt
Correct Answer

A. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here (7/4 \ne 5/(-3)), so the lines intersect. Such a pair has one unique solution.

Step 2

Why this answer is correct

The correct answer is A. एक अद्वितीय हल / One unique solution. Here (7/4 \ne 5/(-3)), so the lines intersect. Such a pair has one unique solution.

Step 3

Exam Tip

यहां (7/4 \ne 5/(-3)), इसलिए रेखाएं कटती हैं। ऐसे युग्म का एक अद्वितीय हल होता है।

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दो टिकटों के दामों के लिए (9x+4y=380) और (18x+8y=775) समीकरण बने। यह प्रणाली कैसी है?

For prices of two tickets, the equations (9x+4y=380) and (18x+8y=775) are formed. What type of system is this?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

The first two ratios are equal but (380/775) is different. Therefore, the system is inconsistent.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. The first two ratios are equal but (380/775) is different. Therefore, the system is inconsistent.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन (380/775) अलग है। इसलिए प्रणाली असंगत है।

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एक दुकान में दो वस्तुओं के लिए (6x+11y=420) और (18x+33y=1260) समीकरण बनते हैं। हलों की संख्या क्या होगी?

In a shop, the equations for two items are (6x+11y=420) and (18x+33y=1260). How many solutions will there be?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

The second equation is (3) times the first. Therefore, both conditions give the same information and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. The second equation is (3) times the first. Therefore, both conditions give the same information and have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों शर्तें एक ही जानकारी देती हैं और अनंत हल होते हैं।

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समीकरणों (18x+7y=61) और (9x+4y=32) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (18x+7y=61) and (9x+4y=32)?

Explanation opens after your attempt
Correct Answer

C. संगत और स्वतंत्रConsistent and independent

Step 1

Concept

Here \(18/9 \ne 7/4\), so the lines intersect. Hence, the pair is consistent and independent.

Step 2

Why this answer is correct

The correct answer is C. संगत और स्वतंत्र / Consistent and independent. Here \(18/9 \ne 7/4\), so the lines intersect. Hence, the pair is consistent and independent.

Step 3

Exam Tip

यहां \(18/9 \ne 7/4\), इसलिए रेखाएं कटती हैं। अतः युग्म संगत और स्वतंत्र है।

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समीकरणों (26x+39y=117) और (2x+3y=10) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (26x+39y=117) and (2x+3y=10)?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

Here (26/2=39/3) but (117/10) is different. Therefore, this is an inconsistent pair.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. Here (26/2=39/3) but (117/10) is different. Therefore, this is an inconsistent pair.

Step 3

Exam Tip

यहां (26/2=39/3) लेकिन (117/10) अलग है। इसलिए यह असंगत युग्म है।

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समीकरणों (30x+45y=210) और (2x+3y=14) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (30x+45y=210) and (2x+3y=14)?

Explanation opens after your attempt
Correct Answer

A. संगत और आश्रितConsistent and dependent

Step 1

Concept

The first equation is (15) times the second. Therefore, both are the same line and the pair is dependent.

Step 2

Why this answer is correct

The correct answer is A. संगत और आश्रित / Consistent and dependent. The first equation is (15) times the second. Therefore, both are the same line and the pair is dependent.

Step 3

Exam Tip

पहला समीकरण दूसरे का (15) गुना है। इसलिए दोनों एक ही रेखा हैं और युग्म आश्रित है।

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समीकरणों (19x+12y=71) और (9x+6y=35) में (a) और (b) के अनुपातों की तुलना से क्या पता चलता है?

What is found by comparing the ratios of (a) and (b) in the equations (19x+12y=71) and (9x+6y=35)?

Explanation opens after your attempt
Correct Answer

C. (199 \ne 12 / 6), इसलिए एक अद्वितीय हल / 6), so one unique solution

Step 1

Concept

Here the first two ratios are different. Therefore, the lines intersect at one point and give one solution.

Step 2

Why this answer is correct

The correct answer is C. \(19 / 9 \ne 12 / 6\), इसलिए एक अद्वितीय हल / 6), so one unique solution. Here the first two ratios are different. Therefore, the lines intersect at one point and give one solution.

Step 3

Exam Tip

यहां पहले दो अनुपात अलग हैं। इसलिए रेखाएं एक बिंदु पर कटती हैं और एक हल देती हैं।

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समीकरणों (24x+32y=96) और (3x+4y=13) को देखकर कौन-सा निष्कर्ष सही है?

Which conclusion is correct by observing the equations (24x+32y=96) and (3x+4y=13)?

Explanation opens after your attempt
Correct Answer

B. पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग हैFirst two ratios are equal but the constant ratio is different

Step 1

Concept

Here (24/3=32/4) but (96/13) is different. Therefore, there will be no solution.

Step 2

Why this answer is correct

The correct answer is B. पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग है / First two ratios are equal but the constant ratio is different. Here (24/3=32/4) but (96/13) is different. Therefore, there will be no solution.

Step 3

Exam Tip

यहां (24/3=32/4) लेकिन (96/13) अलग है। इसलिए कोई हल नहीं होगा।

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समीकरणों (8x+15y=73) और (24x+45y=219) को देखकर सबसे उचित निष्कर्ष क्या है?

What is the most suitable conclusion by observing the equations (8x+15y=73) and (24x+45y=219)?

Explanation opens after your attempt
Correct Answer

C. अनंत हल हैंThere are infinitely many solutions

Step 1

Concept

The second equation is (3) times the first. Therefore, both lines are coincident.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल हैं / There are infinitely many solutions. The second equation is (3) times the first. Therefore, both lines are coincident.

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों रेखाएं संपाती हैं।

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समीकरणों (17x+py=51) और (8x+3y=25) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (17x+py=51) and (8x+3y=25) to have a unique solution?

Explanation opens after your attempt
Correct Answer

B. (p\ne518)

Step 1

Concept

For a unique solution, \(17/8 \ne p/3\) must hold. Therefore, \(p\ne51/8\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is B. \(p\ne51 / 8\). For a unique solution, \(17/8 \ne p/3\) must hold. Therefore, \(p\ne51/8\) is the correct condition.

Step 3

Exam Tip

अद्वितीय हल के लिए \(17/8 \ne p/3\) होना चाहिए। इसलिए \(p\ne51/8\) सही शर्त है।

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समीकरणों (7x+dy=63) और (28x+36y=252) के अनंत हल होने के लिए (d) का मान क्या है?

What is the value of (d) for the equations (7x+dy=63) and (28x+36y=252) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (9)

Step 1

Concept

For infinitely many solutions, (7/28=d/36=63/252) must hold. Therefore, (d=9).

Step 2

Why this answer is correct

The correct answer is C. (9). For infinitely many solutions, (7/28=d/36=63/252) must hold. Therefore, (d=9).

Step 3

Exam Tip

अनंत हल के लिए (7/28=d/36=63/252) होना चाहिए। इसलिए (d=9)।

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समीकरणों (15x+8y-47=0) और (30x+17y-94=0) के लिए सही निष्कर्ष क्या है?

What is the correct conclusion for the equations (15x+8y-47=0) and (30x+17y-94=0)?

Explanation opens after your attempt
Correct Answer

C. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here \(15/30 \ne 8/17\), so the lines intersect at one point. In this case, one unique solution is obtained.

Step 2

Why this answer is correct

The correct answer is C. एक अद्वितीय हल / One unique solution. Here \(15/30 \ne 8/17\), so the lines intersect at one point. In this case, one unique solution is obtained.

Step 3

Exam Tip

यहां \(15/30 \ne 8/17\), इसलिए रेखाएं एक बिंदु पर कटती हैं। ऐसी स्थिति में एक अद्वितीय हल मिलता है।

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समीकरणों (16x-9y+55=0) और (32x-18y+113=0) के लिए सही अनुपात संबंध क्या है?

What is the correct ratio relation for the equations (16x-9y+55=0) and (32x-18y+113=0)?

Explanation opens after your attempt
Correct Answer

A. (1632=(-9) / (-18) \ne 55 / 113)

Step 1

Concept

The first two ratios are equal and the third is different. Therefore, there will be no solution.

Step 2

Why this answer is correct

The correct answer is A. (16 / 32=(-9) / (-18) \ne 55 / 113). The first two ratios are equal and the third is different. Therefore, there will be no solution.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं और तीसरा अलग है। इसलिए कोई हल नहीं होगा।

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समीकरणों (10x+13y-71=0) और (30x+39y-213=0) के लिए सही अनुपात संबंध कौन-सा है?

Which ratio relation is correct for the equations (10x+13y-71=0) and (30x+39y-213=0)?

Explanation opens after your attempt
Correct Answer

C. (1030=13 / 39=(-71) / (-213))

Step 1

Concept

Here all three ratios are equal. Therefore, both lines are coincident and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. (10 / 30=13 / 39=(-71) / (-213)). Here all three ratios are equal. Therefore, both lines are coincident and have infinitely many solutions.

Step 3

Exam Tip

यहां तीनों अनुपात बराबर हैं। इसलिए दोनों रेखाएं संपाती हैं और अनंत हल हैं।

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समीकरणों (5x+17y=69) और (12x+41y=166) के ग्राफ का सही वर्णन क्या है?

What is the correct description of the graph of the equations (5x+17y=69) and (12x+41y=166)?

Explanation opens after your attempt
Correct Answer

C. एक बिंदु पर कटती रेखाएंLines intersecting at one point

Step 1

Concept

Here \(5/12 \ne 17/41\), so the lines will intersect at one point. This gives one unique solution.

Step 2

Why this answer is correct

The correct answer is C. एक बिंदु पर कटती रेखाएं / Lines intersecting at one point. Here \(5/12 \ne 17/41\), so the lines will intersect at one point. This gives one unique solution.

Step 3

Exam Tip

यहां \(5/12 \ne 17/41\), इसलिए रेखाएं एक बिंदु पर कटेंगी। इससे एक अद्वितीय हल मिलेगा।

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समीकरणों (30x+18y=126) और (5x+3y=21) के ग्राफ में क्या दिखेगा?

What will be shown in the graph of the equations (30x+18y=126) and (5x+3y=21)?

Explanation opens after your attempt
Correct Answer

A. एक ही रेखाSame line

Step 1

Concept

The first equation is (6) times the second. Therefore, both equations show the same line.

Step 2

Why this answer is correct

The correct answer is A. एक ही रेखा / Same line. The first equation is (6) times the second. Therefore, both equations show the same line.

Step 3

Exam Tip

पहला समीकरण दूसरे का (6) गुना है। इसलिए दोनों समीकरण एक ही रेखा दिखाते हैं।

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समीकरणों (22x+33y=99) और (2x+3y=12) के ग्राफ के बारे में सही कथन कौन-सा है?

Which statement is correct about the graph of the equations (22x+33y=99) and (2x+3y=12)?

Explanation opens after your attempt
Correct Answer

C. रेखाएं अलग समानांतर हैंLines are distinct parallel

Step 1

Concept

Here (22/2=33/3) but (99/12) is different. Therefore, the graph will show distinct parallel lines.

Step 2

Why this answer is correct

The correct answer is C. रेखाएं अलग समानांतर हैं / Lines are distinct parallel. Here (22/2=33/3) but (99/12) is different. Therefore, the graph will show distinct parallel lines.

Step 3

Exam Tip

यहां (22/2=33/3) लेकिन (99/12) अलग है। इसलिए ग्राफ में अलग समानांतर रेखाएं बनेंगी।

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समीकरणों (bx+16y=64) और (14x+28y=131) का कोई हल न होने के लिए (b) का मान क्या होगा?

What is the value of (b) for the equations (bx+16y=64) and (14x+28y=131) to have no solution?

Explanation opens after your attempt
Correct Answer

C. (8)

Step 1

Concept

For no solution, (b/14=16/28) and (64/131) must be different. Hence, (b=8).

Step 2

Why this answer is correct

The correct answer is C. (8). For no solution, (b/14=16/28) and (64/131) must be different. Hence, (b=8).

Step 3

Exam Tip

कोई हल नहीं के लिए (b/14=16/28) और (64/131) अलग होना चाहिए। इसलिए (b=8)।

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समीकरणों (8x+ay=72) और (24x+30y=216) के अनंत हल होने के लिए (a) क्या होगा?

What will (a) be for the equations (8x+ay=72) and (24x+30y=216) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

For infinitely many solutions, (8/24=a/30=72/216) must hold. This gives (a=10).

Step 2

Why this answer is correct

The correct answer is C. (10). For infinitely many solutions, (8/24=a/30=72/216) must hold. This gives (a=10).

Step 3

Exam Tip

अनंत हल के लिए (8/24=a/30=72/216) होना चाहिए। इससे (a=10) मिलता है।

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समीकरणों (12x+py=60) और (3x+5y=16) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (12x+py=60) and (3x+5y=16) to have a unique solution?

Explanation opens after your attempt
Correct Answer

B. \(p\ne20\)

Step 1

Concept

For a unique solution, \(12/3 \ne p/5\) must hold. Therefore, \(p\ne20\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is B. \(p\ne20\). For a unique solution, \(12/3 \ne p/5\) must hold. Therefore, \(p\ne20\) is the correct condition.

Step 3

Exam Tip

अद्वितीय हल के लिए \(12/3 \ne p/5\) होना चाहिए। इसलिए \(p\ne20\) सही शर्त है।

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समीकरणों (13x+qy=52) और (26x+18y=104) के अनंत हल होने के लिए (q) का मान क्या है?

What is the value of (q) for the equations (13x+qy=52) and (26x+18y=104) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (9)

Step 1

Concept

The second equation is (2) times the first, so (q/18=1/2) must hold. Hence, (q=9).

Step 2

Why this answer is correct

The correct answer is C. (9). The second equation is (2) times the first, so (q/18=1/2) must hold. Hence, (q=9).

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है, इसलिए (q/18=1/2) होना चाहिए। अतः (q=9)।

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समीकरणों (kx+14y=42) और (18x+21y=63) के अनंत हल होने के लिए (k) क्या होगा?

What will (k) be for the equations (kx+14y=42) and (18x+21y=63) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (12)

Step 1

Concept

For infinitely many solutions, (k/18=14/21=42/63) must hold. Therefore, (k=12) is correct.

Step 2

Why this answer is correct

The correct answer is C. (12). For infinitely many solutions, (k/18=14/21=42/63) must hold. Therefore, (k=12) is correct.

Step 3

Exam Tip

अनंत हल के लिए (k/18=14/21=42/63) होना चाहिए। इसलिए (k=12) सही है।

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समीकरणों (11x+14y=53) और (17x+22y=83) के लिए सही हल-स्थिति क्या है?

What is the correct solution status for the equations (11x+14y=53) and (17x+22y=83)?

Explanation opens after your attempt
Correct Answer

B. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here \(11/17 \ne 14/22\), so the lines intersect at one point. If the first two ratios are different, one unique solution is obtained.

Step 2

Why this answer is correct

The correct answer is B. एक अद्वितीय हल / One unique solution. Here \(11/17 \ne 14/22\), so the lines intersect at one point. If the first two ratios are different, one unique solution is obtained.

Step 3

Exam Tip

यहां \(11/17 \ne 14/22\), इसलिए रेखाएं एक बिंदु पर कटती हैं। पहले दो अनुपात अलग हों तो एक अद्वितीय हल मिलता है।

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समीकरणों (9x+5y=41) और (18x+10y=85) के लिए हलों की संख्या क्या होगी?

How many solutions will the equations (9x+5y=41) and (18x+10y=85) have?

Explanation opens after your attempt
Correct Answer

C. कोई हल नहींNo solution

Step 1

Concept

Here (9/18=5/10) but (41/85) is different. Therefore, the lines are parallel and distinct.

Step 2

Why this answer is correct

The correct answer is C. कोई हल नहीं / No solution. Here (9/18=5/10) but (41/85) is different. Therefore, the lines are parallel and distinct.

Step 3

Exam Tip

यहां (9/18=5/10) लेकिन (41/85) अलग है। इसलिए रेखाएं समानांतर और अलग हैं।

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समीकरणों (7x-4y=29) और (21x-12y=87) के लिए सही निष्कर्ष कौन-सा है?

Which conclusion is correct for the equations (7x-4y=29) and (21x-12y=87)?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

The second equation is (3) times the first. Therefore, both lines are coincident and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. The second equation is (3) times the first. Therefore, both lines are coincident and have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों रेखाएं संपाती हैं और अनंत हल हैं।

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समीकरणों (px+9y=45) और (20x+30y=103) का कोई हल न होने के लिए (p) का मान क्या होगा?

What is the value of (p) for the equations (px+9y=45) and (20x+30y=103) to have no solution?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

For no solution, (p/20=9/30) and (45/103) must be different. This gives (p=6).

Step 2

Why this answer is correct

The correct answer is B. (6). For no solution, (p/20=9/30) and (45/103) must be different. This gives (p=6).

Step 3

Exam Tip

कोई हल नहीं के लिए (p/20=9/30) और (45/103) अलग होना चाहिए। इससे (p=6) मिलता है।

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समीकरणों (4x+ay=32) और (12x+21y=96) के अनंत हल होने के लिए (a) का मान क्या होगा?

What is the value of (a) for the equations (4x+ay=32) and (12x+21y=96) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

For infinitely many solutions, (4/12=a/21=32/96) must hold. Therefore, (a=7) is correct.

Step 2

Why this answer is correct

The correct answer is C. (7). For infinitely many solutions, (4/12=a/21=32/96) must hold. Therefore, (a=7) is correct.

Step 3

Exam Tip

अनंत हल के लिए (4/12=a/21=32/96) होना चाहिए। इसलिए (a=7) सही है।

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समीकरणों (18x+5y=79) और (36x+10y=158) को देखकर कौन-सा कथन सही है?

Which statement is correct by observing the equations (18x+5y=79) and (36x+10y=158)?

Explanation opens after your attempt
Correct Answer

B. रेखाएं एक ही हैंLines are the same

Step 1

Concept

The second equation is (2) times the first. Therefore, both lines are the same and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is B. रेखाएं एक ही हैं / Lines are the same. The second equation is (2) times the first. Therefore, both lines are the same and have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है। इसलिए दोनों रेखाएं एक ही हैं और अनंत हल हैं।

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दो वस्तुओं की कीमतों के लिए (9x+4y=360) और (27x+12y=1090) समीकरण बने। यह प्रणाली कैसी है?

For prices of two items, the equations (9x+4y=360) and (27x+12y=1090) are formed. What type of system is this?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

The first two ratios are equal but (360/1090) is different. Therefore, the system is inconsistent.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. The first two ratios are equal but (360/1090) is different. Therefore, the system is inconsistent.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन (360/1090) अलग है। इसलिए प्रणाली असंगत है।

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समीकरणों (6x+17y=71) और (11x+31y=130) में (a) और (b) के अनुपातों की तुलना से क्या निष्कर्ष निकलेगा?

What conclusion follows from comparing the ratios of (a) and (b) in the equations (6x+17y=71) and (11x+31y=130)?

Explanation opens after your attempt
Correct Answer

C. (611 \ne 17 / 31), इसलिए एक अद्वितीय हल / 31), so one unique solution

Step 1

Concept

Here the first two ratios are different. Therefore, the lines intersect at one point and give one unique solution.

Step 2

Why this answer is correct

The correct answer is C. \(6 / 11 \ne 17 / 31\), इसलिए एक अद्वितीय हल / 31), so one unique solution. Here the first two ratios are different. Therefore, the lines intersect at one point and give one unique solution.

Step 3

Exam Tip

यहां पहले दो अनुपात अलग हैं। इसलिए रेखाएं एक बिंदु पर कटती हैं और एक अद्वितीय हल देती हैं।

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समीकरणों (14x-8y+25=0) और (21x-12y+40=0) के लिए सही हल-स्थिति क्या है?

What is the correct solution status for the equations (14x-8y+25=0) and (21x-12y+40=0)?

Explanation opens after your attempt
Correct Answer

C. कोई हल नहींNo solution

Step 1

Concept

Here (14/21=(-8)/(-12)) but (25/40) is different. Therefore, the lines are parallel and distinct.

Step 2

Why this answer is correct

The correct answer is C. कोई हल नहीं / No solution. Here (14/21=(-8)/(-12)) but (25/40) is different. Therefore, the lines are parallel and distinct.

Step 3

Exam Tip

यहां (14/21=(-8)/(-12)) लेकिन (25/40) अलग है। इसलिए रेखाएं समानांतर और अलग हैं।

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समीकरणों (13x+py=52) और (6x+5y=24) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (13x+py=52) and (6x+5y=24) to have a unique solution?

Explanation opens after your attempt
Correct Answer

A. (p \ne 656)

Step 1

Concept

For a unique solution, \(13/6 \ne p/5\) must hold. Therefore, \(p \ne 65/6\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is A. \(p \ne 65 / 6\). For a unique solution, \(13/6 \ne p/5\) must hold. Therefore, \(p \ne 65/6\) is the correct condition.

Step 3

Exam Tip

अद्वितीय हल के लिए \(13/6 \ne p/5\) होना चाहिए। इसलिए \(p \ne 65/6\) सही शर्त है।

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समीकरणों (bx+9y=36) और (16x+24y=97) का कोई हल न होने के लिए (b) का मान क्या होगा?

What is the value of (b) for the equations (bx+9y=36) and (16x+24y=97) to have no solution?

Explanation opens after your attempt
Correct Answer

D. (6)

Step 1

Concept

For no solution, (b/16=9/24) and (36/97) must be different. Hence, (b=6).

Step 2

Why this answer is correct

The correct answer is D. (6). For no solution, (b/16=9/24) and (36/97) must be different. Hence, (b=6).

Step 3

Exam Tip

कोई हल नहीं के लिए (b/16=9/24) और (36/97) अलग होना चाहिए। इसलिए (b=6)।

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समीकरणों (5x+ay=45) और (20x+28y=180) के अनंत हल होने के लिए (a) का मान क्या होगा?

What is the value of (a) for the equations (5x+ay=45) and (20x+28y=180) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

For infinitely many solutions, (5/20=a/28=45/180) must hold. Therefore, (a=7) is correct.

Step 2

Why this answer is correct

The correct answer is C. (7). For infinitely many solutions, (5/20=a/28=45/180) must hold. Therefore, (a=7) is correct.

Step 3

Exam Tip

अनंत हल के लिए (5/20=a/28=45/180) होना चाहिए। इसलिए (a=7) सही है।

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समीकरणों (4x+7y=31) और (12x+21y=t) के असंगत होने के लिए (t) के लिए सही शर्त क्या है?

What is the correct condition on (t) for the equations (4x+7y=31) and (12x+21y=t) to be inconsistent?

Explanation opens after your attempt
Correct Answer

B. \(t \ne 93\)

Step 1

Concept

The first two ratios are equal. For inconsistency, the constant ratio must be different so \(t \ne 93\).

Step 2

Why this answer is correct

The correct answer is B. \(t \ne 93\). The first two ratios are equal. For inconsistency, the constant ratio must be different so \(t \ne 93\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं। असंगत होने के लिए स्थिर पद का अनुपात अलग होना चाहिए इसलिए \(t \ne 93\)।

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समीकरणों (23x+10y=83) और (11x+5y=39) के लिए सही हल-स्थिति क्या है?

What is the correct solution status for the equations (23x+10y=83) and (11x+5y=39)?

Explanation opens after your attempt
Correct Answer

C. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here \(23/11 \ne 10/5\) so the lines will intersect. Hence, there is one unique solution.

Step 2

Why this answer is correct

The correct answer is C. एक अद्वितीय हल / One unique solution. Here \(23/11 \ne 10/5\) so the lines will intersect. Hence, there is one unique solution.

Step 3

Exam Tip

यहां \(23/11 \ne 10/5\) इसलिए रेखाएं कटेंगी। अतः एक अद्वितीय हल है।

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समीकरणों (20x-15y=85) और (4x-3y=18) को देखकर सही निष्कर्ष क्या है?

What is the correct conclusion by observing the equations (20x-15y=85) and (4x-3y=18)?

Explanation opens after your attempt
Correct Answer

A. कोई हल नहींNo solution

Step 1

Concept

Here (20/4=(-15)/(-3)) but (85/18) is different. Therefore, the lines are parallel and distinct.

Step 2

Why this answer is correct

The correct answer is A. कोई हल नहीं / No solution. Here (20/4=(-15)/(-3)) but (85/18) is different. Therefore, the lines are parallel and distinct.

Step 3

Exam Tip

यहां (20/4=(-15)/(-3)) लेकिन (85/18) अलग है। इसलिए रेखाएं समानांतर और अलग हैं।

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समीकरणों (16x+11y=73) और (32x+22y=146) को देखकर कौन-सा कथन सही है?

Which statement is correct by observing the equations (16x+11y=73) and (32x+22y=146)?

Explanation opens after your attempt
Correct Answer

B. रेखाएं एक ही हैंLines are the same

Step 1

Concept

The second equation is (2) times the first. Therefore, both lines are the same.

Step 2

Why this answer is correct

The correct answer is B. रेखाएं एक ही हैं / Lines are the same. The second equation is (2) times the first. Therefore, both lines are the same.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है। इसलिए दोनों रेखाएं एक ही हैं।

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समीकरणों (10x+ky=110) और (2x+9y=22) के अनंत हल होने के लिए (k) क्या होगा?

What will (k) be for the equations (10x+ky=110) and (2x+9y=22) to have infinitely many solutions?

Explanation opens after your attempt
Correct Answer

C. (45)

Step 1

Concept

The first equation must be (5) times the second. Therefore, (k=45).

Step 2

Why this answer is correct

The correct answer is C. (45). The first equation must be (5) times the second. Therefore, (k=45).

Step 3

Exam Tip

पहला समीकरण दूसरे का (5) गुना होना चाहिए। इसलिए (k=45) है।

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समीकरणों (8x+7y=34) और (16x+ay=79) का कोई हल न होने के लिए (a) क्या होगा?

What will (a) be for the equations (8x+7y=34) and (16x+ay=79) to have no solution?

Explanation opens after your attempt
Correct Answer

C. (14)

Step 1

Concept

For no solution, (8/16=7/a) and (34/79) must be different. This gives (a=14).

Step 2

Why this answer is correct

The correct answer is C. (14). For no solution, (8/16=7/a) and (34/79) must be different. This gives (a=14).

Step 3

Exam Tip

कोई हल नहीं के लिए (8/16=7/a) और (34/79) अलग होना चाहिए। इससे (a=14) मिलता है।

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समीकरणों (11x+6y=37) और (22x+12y=r) के असंगत होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (11x+6y=37) and (22x+12y=r) to be inconsistent?

Explanation opens after your attempt
Correct Answer

B. \(r \ne 74\)

Step 1

Concept

The first two ratios are equal. For inconsistency, the constant ratio must be different so \(r \ne 74\).

Step 2

Why this answer is correct

The correct answer is B. \(r \ne 74\). The first two ratios are equal. For inconsistency, the constant ratio must be different so \(r \ne 74\).

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं। असंगत होने के लिए स्थिर पद का अनुपात अलग होना चाहिए इसलिए \(r \ne 74\)।

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समीकरणों (7x+13y=67) और (21x+39y=s) के संगत और आश्रित होने के लिए (s) क्या होगा?

What should (s) be for the equations (7x+13y=67) and (21x+39y=s) to be consistent and dependent?

Explanation opens after your attempt
Correct Answer

C. (201)

Step 1

Concept

To be consistent and dependent, the second equation must be (3) times the first. Hence, (s=201).

Step 2

Why this answer is correct

The correct answer is C. (201). To be consistent and dependent, the second equation must be (3) times the first. Hence, (s=201).

Step 3

Exam Tip

संगत और आश्रित होने के लिए दूसरा समीकरण पहले का (3) गुना होना चाहिए। अतः (s=201)।

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समीकरणों (10x+11y=43) और (20x+21y=84) के लिए कौन-सा कथन सही है?

Which statement is correct for the equations (10x+11y=43) and (20x+21y=84)?

Explanation opens after your attempt
Correct Answer

B. (1020 \ne 11 / 21) इसलिए एक अद्वितीय हल / 21) so one unique solution

Step 1

Concept

Here \(10/20 \ne 11/21\) so the lines intersect. Therefore, there is one unique solution.

Step 2

Why this answer is correct

The correct answer is B. \(10 / 20 \ne 11 / 21\) इसलिए एक अद्वितीय हल / 21) so one unique solution. Here \(10/20 \ne 11/21\) so the lines intersect. Therefore, there is one unique solution.

Step 3

Exam Tip

यहां \(10/20 \ne 11/21\) इसलिए रेखाएं कटती हैं। इस कारण एक अद्वितीय हल है।

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समीकरणों (14x+21y=98) और (2x+3y=17) के लिए कौन-सा संबंध सही है?

Which relation is correct for the equations (14x+21y=98) and (2x+3y=17)?

Explanation opens after your attempt
Correct Answer

C. (142=21 / 3 \ne 98 / 17)

Step 1

Concept

The first two ratios are equal but the constant ratio is different. Therefore, there is no solution.

Step 2

Why this answer is correct

The correct answer is C. \(14 / 2=21 / 3 \ne 98 / 17\). The first two ratios are equal but the constant ratio is different. Therefore, there is no solution.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग है। इसलिए कोई हल नहीं है।

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समीकरणों (9x+16y=74) और (27x+48y=222) में तीनों अनुपातों का संबंध क्या है?

What is the relation among all three ratios in the equations (9x+16y=74) and (27x+48y=222)?

Explanation opens after your attempt
Correct Answer

A. तीनों बराबर हैंAll three are equal

Step 1

Concept

Here (9/27=16/48=74/222). Therefore, both equations form the same line.

Step 2

Why this answer is correct

The correct answer is A. तीनों बराबर हैं / All three are equal. Here (9/27=16/48=74/222). Therefore, both equations form the same line.

Step 3

Exam Tip

यहां (9/27=16/48=74/222)। इसलिए दोनों समीकरण एक ही रेखा बनाते हैं।

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दो संख्याओं के लिए (6x+5y=49) और (3x-2y=7) समीकरण बनते हैं, तो हल-स्थिति क्या होगी?

For two numbers, the equations (6x+5y=49) and (3x-2y=7) are formed. What will be the solution status?

Explanation opens after your attempt
Correct Answer

A. एक अद्वितीय हलOne unique solution

Step 1

Concept

Here (6/3 \ne 5/(-2)) so the lines intersect. Such a pair has one unique solution.

Step 2

Why this answer is correct

The correct answer is A. एक अद्वितीय हल / One unique solution. Here (6/3 \ne 5/(-2)) so the lines intersect. Such a pair has one unique solution.

Step 3

Exam Tip

यहां (6/3 \ne 5/(-2)) इसलिए रेखाएं कटती हैं। ऐसे युग्म का एक अद्वितीय हल होता है।

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दो टिकटों के दामों के लिए (8x+3y=280) और (16x+6y=575) समीकरण बने। यह प्रणाली कैसी है?

For prices of two tickets, the equations (8x+3y=280) and (16x+6y=575) are formed. What type of system is this?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

The first two ratios are equal but (280/575) is different. Therefore, the system is inconsistent.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. The first two ratios are equal but (280/575) is different. Therefore, the system is inconsistent.

Step 3

Exam Tip

पहले दो अनुपात बराबर हैं लेकिन (280/575) अलग है। इसलिए प्रणाली असंगत है।

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एक दुकान में दो वस्तुओं के लिए (5x+9y=300) और (15x+27y=900) समीकरण बनते हैं। हलों की संख्या क्या होगी?

In a shop, the equations for two items are (5x+9y=300) and (15x+27y=900). How many solutions will there be?

Explanation opens after your attempt
Correct Answer

C. अनंत हलInfinitely many solutions

Step 1

Concept

The second equation is (3) times the first. Therefore, both conditions give the same information and have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल / Infinitely many solutions. The second equation is (3) times the first. Therefore, both conditions give the same information and have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों शर्तें एक ही जानकारी देती हैं और अनंत हल होते हैं।

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समीकरणों (16x+7y=55) और (8x+4y=29) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (16x+7y=55) and (8x+4y=29)?

Explanation opens after your attempt
Correct Answer

C. संगत और स्वतंत्रConsistent and independent

Step 1

Concept

Here \(16/8 \ne 7/4\) so the lines intersect. Hence, the pair is consistent and independent.

Step 2

Why this answer is correct

The correct answer is C. संगत और स्वतंत्र / Consistent and independent. Here \(16/8 \ne 7/4\) so the lines intersect. Hence, the pair is consistent and independent.

Step 3

Exam Tip

यहां \(16/8 \ne 7/4\) इसलिए रेखाएं कटती हैं। अतः युग्म संगत और स्वतंत्र है।

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समीकरणों (22x+33y=99) और (2x+3y=11) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (22x+33y=99) and (2x+3y=11)?

Explanation opens after your attempt
Correct Answer

C. असंगतInconsistent

Step 1

Concept

Here (22/2=33/3) but (99/11) is different. Therefore, this is an inconsistent pair.

Step 2

Why this answer is correct

The correct answer is C. असंगत / Inconsistent. Here (22/2=33/3) but (99/11) is different. Therefore, this is an inconsistent pair.

Step 3

Exam Tip

यहां (22/2=33/3) लेकिन (99/11) अलग है। इसलिए यह असंगत युग्म है।

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समीकरणों (24x+36y=168) और (2x+3y=14) का युग्म किस प्रकार का है?

What type of pair is formed by the equations (24x+36y=168) and (2x+3y=14)?

Explanation opens after your attempt
Correct Answer

A. संगत और आश्रितConsistent and dependent

Step 1

Concept

The first equation is (12) times the second. Therefore, both are the same line and the pair is dependent.

Step 2

Why this answer is correct

The correct answer is A. संगत और आश्रित / Consistent and dependent. The first equation is (12) times the second. Therefore, both are the same line and the pair is dependent.

Step 3

Exam Tip

पहला समीकरण दूसरे का (12) गुना है। इसलिए दोनों एक ही रेखा हैं और युग्म आश्रित है।

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समीकरणों (17x+10y=61) और (8x+5y=29) में (a) और (b) के अनुपातों की तुलना से क्या पता चलता है?

What is found by comparing the ratios of (a) and (b) in the equations (17x+10y=61) and (8x+5y=29)?

Explanation opens after your attempt
Correct Answer

C. (178 \ne 10 / 5) इसलिए एक अद्वितीय हल / 5) so one unique solution

Step 1

Concept

Here the first two ratios are different. Therefore, the lines intersect at one point and give one solution.

Step 2

Why this answer is correct

The correct answer is C. \(17 / 8 \ne 10 / 5\) इसलिए एक अद्वितीय हल / 5) so one unique solution. Here the first two ratios are different. Therefore, the lines intersect at one point and give one solution.

Step 3

Exam Tip

यहां पहले दो अनुपात अलग हैं। इसलिए रेखाएं एक बिंदु पर कटती हैं और एक हल देती हैं।

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समीकरणों (21x+28y=84) और (3x+4y=15) को देखकर कौन-सा निष्कर्ष सही है?

Which conclusion is correct by observing the equations (21x+28y=84) and (3x+4y=15)?

Explanation opens after your attempt
Correct Answer

B. पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग हैFirst two ratios are equal but the constant ratio is different

Step 1

Concept

Here (21/3=28/4) but (84/15) is different. Therefore, there will be no solution.

Step 2

Why this answer is correct

The correct answer is B. पहले दो अनुपात बराबर हैं लेकिन स्थिर पद का अनुपात अलग है / First two ratios are equal but the constant ratio is different. Here (21/3=28/4) but (84/15) is different. Therefore, there will be no solution.

Step 3

Exam Tip

यहां (21/3=28/4) लेकिन (84/15) अलग है। इसलिए कोई हल नहीं होगा।

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समीकरणों (9x+14y=71) और (27x+42y=213) को देखकर सबसे उचित निष्कर्ष क्या है?

What is the most suitable conclusion by observing the equations (9x+14y=71) and (27x+42y=213)?

Explanation opens after your attempt
Correct Answer

C. अनंत हल हैंThere are infinitely many solutions

Step 1

Concept

The second equation is (3) times the first. Therefore, both lines are coincident.

Step 2

Why this answer is correct

The correct answer is C. अनंत हल हैं / There are infinitely many solutions. The second equation is (3) times the first. Therefore, both lines are coincident.

Step 3

Exam Tip

दूसरा समीकरण पहले का (3) गुना है। इसलिए दोनों रेखाएं संपाती हैं।

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समीकरणों (15x+py=45) और (7x+2y=24) का अद्वितीय हल होने के लिए कौन-सी शर्त सही है?

Which condition is correct for the equations (15x+py=45) and (7x+2y=24) to have a unique solution?

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Correct Answer

B. (p \ne 307)

Step 1

Concept

For a unique solution, \(15/7 \ne p/2\) must hold. Therefore, \(p \ne 30/7\) is the correct condition.

Step 2

Why this answer is correct

The correct answer is B. \(p \ne 30 / 7\). For a unique solution, \(15/7 \ne p/2\) must hold. Therefore, \(p \ne 30/7\) is the correct condition.

Step 3

Exam Tip

अद्वितीय हल के लिए \(15/7 \ne p/2\) होना चाहिए। इसलिए \(p \ne 30/7\) सही शर्त है।

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समीकरणों (6x+dy=54) और (18x+30y=162) के अनंत हल होने के लिए (d) का मान क्या है?

What is the value of (d) for the equations (6x+dy=54) and (18x+30y=162) to have infinitely many solutions?

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Correct Answer

C. (10)

Step 1

Concept

For infinitely many solutions, (6/18=d/30=54/162) must hold. Therefore, (d=10).

Step 2

Why this answer is correct

The correct answer is C. (10). For infinitely many solutions, (6/18=d/30=54/162) must hold. Therefore, (d=10).

Step 3

Exam Tip

अनंत हल के लिए (6/18=d/30=54/162) होना चाहिए। इसलिए (d=10)।

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