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33 results found for "minus" in Class 10.

यदि \(S_n=5n^2-n\), तो \(S_{9}\) का मान क्या है?

If \(S_n=5n^2-n\), what is the value of \(S_9\)?

Explanation opens after your attempt
Correct Answer

A. (396)

Step 1

Concept

(S_9=5(9)2-9=396). Pay attention to the sign because subtraction is involved.

Step 2

Why this answer is correct

The correct answer is A. (396). (S_9=5(9)2-9=396). Pay attention to the sign because subtraction is involved.

Step 3

Exam Tip

(S_9=5(9)2-9=396)। संकेत का ध्यान रखें क्योंकि यहाँ घटाव है।

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किसी समांतर श्रेणी के पहले दो पद \(\lambda-4\) और \(3\lambda+2\) हैं। सामान्य अंतर क्या है?

The first two terms of an AP are \(\lambda-4\) and \(3\lambda+2\). What is the common difference?

Explanation opens after your attempt
Correct Answer

A. \(2\lambda+6\)

Step 1

Concept

The common difference is second term minus first term, so (3\lambda+2-\(\lambda-4\)=2\lambda+6). In exams, handle the minus sign before brackets carefully.

Step 2

Why this answer is correct

The correct answer is A. \(2\lambda+6\). The common difference is second term minus first term, so (3\lambda+2-\(\lambda-4\)=2\lambda+6). In exams, handle the minus sign before brackets carefully.

Step 3

Exam Tip

सामान्य अंतर दूसरा पद घटा पहला पद है, इसलिए (3\lambda+2-\(\lambda-4\)=2\lambda+6)। परीक्षा में कोष्ठक हटाते समय ऋण चिन्ह संभालें।

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यदि (p-3,2p+1,5p-7) समांतर श्रेणी के लगातार पद हैं, तो (p) और सामान्य अंतर क्या हैं?

If (p-3,2p+1,5p-7) are consecutive terms of an AP, what are (p) and the common difference?

Explanation opens after your attempt
Correct Answer

D. (p=6,d=10)

Step 1

Concept

Equating differences gives (p+4=3p-8), so (p=6) and (d=10). For three consecutive terms, set second minus first equal to third minus second.

Step 2

Why this answer is correct

The correct answer is D. (p=6,d=10). Equating differences gives (p+4=3p-8), so (p=6) and (d=10). For three consecutive terms, set second minus first equal to third minus second.

Step 3

Exam Tip

बराबर अंतर रखने पर (p+4=3p-8), इसलिए (p=6) और (d=10)। परीक्षा में तीन लगातार पदों के लिए दूसरा घटाकर पहला और तीसरा घटाकर दूसरा बराबर करें।

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यदि \(28,21,14,7,\ldots\) में (d) ज्ञात करना हो तो सही गणना कौन सी है?

If (d) is to be found in \(28,21,14,7,\ldots\), which calculation is correct?

Explanation opens after your attempt
Correct Answer

C. (21-28=-7)

Step 1

Concept

The common difference is next term minus previous term, so (21-28=-7). In a decreasing sequence the order of subtraction is very important.

Step 2

Why this answer is correct

The correct answer is C. (21-28=-7). The common difference is next term minus previous term, so (21-28=-7). In a decreasing sequence the order of subtraction is very important.

Step 3

Exam Tip

सार्व अंतर अगला पद घटा पिछला पद है इसलिए (21-28=-7)। घटते अनुक्रम में घटाव का क्रम बहुत जरूरी है।

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यदि \(15,10,5,0,\ldots\) में (d) ज्ञात करना हो तो सही गणना कौन सी है?

If (d) is to be found in \(15,10,5,0,\ldots\), which calculation is correct?

Explanation opens after your attempt
Correct Answer

C. (10-15=-5)

Step 1

Concept

The common difference is next term minus previous term, so (10-15=-5). In a decreasing sequence the order of subtraction is very important.

Step 2

Why this answer is correct

The correct answer is C. (10-15=-5). The common difference is next term minus previous term, so (10-15=-5). In a decreasing sequence the order of subtraction is very important.

Step 3

Exam Tip

सार्व अंतर बाद वाला पद घटा पहले वाला पद है इसलिए (10-15=-5)। घटते अनुक्रम में घटाव का क्रम बहुत जरूरी है।

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अनुक्रम \(2,9,16,23,\ldots\) में दूसरा और तीसरा पद घटाकर (d) क्या मिलेगा?

By subtracting the second and third terms in \(2,9,16,23,\ldots\), what (d) will be obtained?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

The third term minus the second term is (16-9=7). Any two consecutive terms should give the same (d).

Step 2

Why this answer is correct

The correct answer is C. (7). The third term minus the second term is (16-9=7). Any two consecutive terms should give the same (d).

Step 3

Exam Tip

तीसरा पद घटा दूसरा पद (16-9=7) है। किसी भी दो लगातार पदों से वही (d) मिलना चाहिए।

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अनुक्रम \(7,11,15,19,\ldots\) में पहले दो पदों से सार्व अंतर कैसे मिलेगा?

How will the common difference be found from the first two terms of \(7,11,15,19,\ldots\)?

Explanation opens after your attempt
Correct Answer

B. (11-7=4)

Step 1

Concept

The common difference is second term minus first term, so (11-7=4). In exams do not reverse the order of subtraction.

Step 2

Why this answer is correct

The correct answer is B. (11-7=4). The common difference is second term minus first term, so (11-7=4). In exams do not reverse the order of subtraction.

Step 3

Exam Tip

सार्व अंतर दूसरा पद घटा पहला पद होता है इसलिए (11-7=4) है। परीक्षा में घटाव का क्रम न बदलें।

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यदि समांतर श्रेढ़ी के लगातार दो पद (18) और (23) हैं, तो सार्व अंतर क्या होगा?

If two consecutive terms of an arithmetic progression are (18) and (23), what is the common difference?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

The common difference is the second term minus the first term. Therefore, (23-18=5).

Step 2

Why this answer is correct

The correct answer is A. (5). The common difference is the second term minus the first term. Therefore, (23-18=5).

Step 3

Exam Tip

सार्व अंतर दूसरा पद घटा पहला पद होता है। इसलिए (23-18=5)।

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समीकरण (y=15-2x) और (x-y=6) का हल चुनें।

Choose the solution of (y=15-2x) and (x-y=6).

Explanation opens after your attempt
Correct Answer

D. ( (7,1) )

Step 1

Concept

Putting (15-2x) in place of (y) gives (x-(15-2x)=6), so (x=7) and (y=1). Always use brackets with a minus sign.

Step 2

Why this answer is correct

The correct answer is D. ( (7,1) ). Putting (15-2x) in place of (y) gives (x-(15-2x)=6), so (x=7) and (y=1). Always use brackets with a minus sign.

Step 3

Exam Tip

(15-2x) को (y) की जगह रखने पर (x-(15-2x)=6), इसलिए (x=7) और (y=1)। ऋण के साथ कोष्ठक जरूर लगाएँ।

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समीकरण (3x-y=7) में (x=3) रखने पर (y) क्या होगा?

In (3x-y=7), if (x=3), what is (y)?

Explanation opens after your attempt
Correct Answer

A. (y=2)

Step 1

Concept

(9-y=7), so (y=2). Be careful while solving a term with a negative sign.

Step 2

Why this answer is correct

The correct answer is A. (y=2). (9-y=7), so (y=2). Be careful while solving a term with a negative sign.

Step 3

Exam Tip

(9-y=7), इसलिए (y=2)। ऋण चिह्न वाले पद को हल करते समय सावधानी रखें।

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यदि (x-y=6) और (y=2), तो (x) का मान क्या होगा?

If (x-y=6) and (y=2), what is the value of (x)?

Explanation opens after your attempt
Correct Answer

C. (x=8)

Step 1

Concept

(x-2=6), so (x=8). Put (y) with the correct sign in a subtraction equation.

Step 2

Why this answer is correct

The correct answer is C. (x=8). (x-2=6), so (x=8). Put (y) with the correct sign in a subtraction equation.

Step 3

Exam Tip

(x-2=6), इसलिए (x=8)। घटाव समीकरण में (y) को सही चिह्न के साथ रखें।

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यदि (2x-y=5) और (x=4), तो (y) का मान ज्ञात करें।

If (2x-y=5) and (x=4), find the value of (y).

Explanation opens after your attempt
Correct Answer

B. (y=3)

Step 1

Concept

(8-y=5), so (y=3). When there is a minus sign, balance both sides carefully.

Step 2

Why this answer is correct

The correct answer is B. (y=3). (8-y=5), so (y=3). When there is a minus sign, balance both sides carefully.

Step 3

Exam Tip

(8-y=5), इसलिए (y=3)। समीकरण में ऋण चिह्न हो तो दोनों पक्षों को ध्यान से संतुलित करें।

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बहुपद \(4x^3+x^2-7x+1\) में कितने पद हैं?

How many terms are there in \(4x^3+x^2-7x+1\)?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

The terms are \(4x^3\), \(x^2\), (-7x), and (1). Separate terms by plus or minus signs.

Step 2

Why this answer is correct

The correct answer is C. (4). The terms are \(4x^3\), \(x^2\), (-7x), and (1). Separate terms by plus or minus signs.

Step 3

Exam Tip

पद \(4x^3\), \(x^2\), (-7x) और (1) हैं। पदों को जोड़ या घटाव के चिह्नों से अलग करें।

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बहुपद \(3x^2+2x-1\) में कितने पद हैं?

How many terms are there in the polynomial \(3x^2+2x-1\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The terms are \(3x^2\), (2x), and (-1). Separate terms by plus or minus signs.

Step 2

Why this answer is correct

The correct answer is C. (3). The terms are \(3x^2\), (2x), and (-1). Separate terms by plus or minus signs.

Step 3

Exam Tip

यहाँ पद \(3x^2\), (2x) और (-1) हैं। पदों को जोड़ या घटाव के संकेतों से अलग करें।

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((9x+2)-(4x-6)) का सरल रूप क्या है?

What is the simplified form of ((9x+2)-(4x-6))?

Explanation opens after your attempt
Correct Answer

B. (5x+8)

Step 1

Concept

The minus sign applies to both terms in the second bracket. (9x+2-4x+6=5x+8).

Step 2

Why this answer is correct

The correct answer is B. (5x+8). The minus sign applies to both terms in the second bracket. (9x+2-4x+6=5x+8).

Step 3

Exam Tip

ऋण चिह्न दूसरे कोष्ठक के दोनों पदों पर लगेगा। (9x+2-4x+6=5x+8) है।

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((7x-2)-(3x+5)) का सरल रूप क्या है?

What is the simplified form of ((7x-2)-(3x+5))?

Explanation opens after your attempt
Correct Answer

A. (4x-7)

Step 1

Concept

The minus sign applies to both terms in the second bracket. (7x-2-3x-5=4x-7).

Step 2

Why this answer is correct

The correct answer is A. (4x-7). The minus sign applies to both terms in the second bracket. (7x-2-3x-5=4x-7).

Step 3

Exam Tip

ऋण चिह्न दूसरे कोष्ठक के दोनों पदों पर लगेगा। (7x-2-3x-5=4x-7) है।

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((5x+1)-(2x-4)) का सरल रूप क्या है?

What is the simplified form of ((5x+1)-(2x-4))?

Explanation opens after your attempt
Correct Answer

B. (3x+5)

Step 1

Concept

The minus sign applies to both terms in the second bracket. (5x+1-2x+4=3x+5).

Step 2

Why this answer is correct

The correct answer is B. (3x+5). The minus sign applies to both terms in the second bracket. (5x+1-2x+4=3x+5).

Step 3

Exam Tip

ऋण चिह्न दूसरे कोष्ठक के दोनों पदों पर लगेगा। (5x+1-2x+4=3x+5) है।

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(6x+7y+4) में पदों की संख्या कितनी है?

How many terms are there in (6x+7y+4)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The expression has three terms: (6x), (7y), and (4). Identify terms by plus or minus signs.

Step 2

Why this answer is correct

The correct answer is C. (3). The expression has three terms: (6x), (7y), and (4). Identify terms by plus or minus signs.

Step 3

Exam Tip

इस व्यंजक में (6x), (7y) और (4) तीन पद हैं। पदों को जोड़ या घटाव से अलग पहचानें।

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(4x+5y+2) में पदों की संख्या कितनी है?

How many terms are there in (4x+5y+2)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The expression has three terms: (4x), (5y), and (2). Separate terms by plus or minus signs.

Step 2

Why this answer is correct

The correct answer is C. (3). The expression has three terms: (4x), (5y), and (2). Separate terms by plus or minus signs.

Step 3

Exam Tip

इस व्यंजक में (4x), (5y) और (2) तीन पद हैं। पदों को जोड़ या घटाव से अलग करें।

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(2x+3y) में पदों की संख्या कितनी है?

How many terms are there in (2x+3y)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

In (2x+3y), the two terms are (2x) and (3y). Identify terms by plus or minus signs.

Step 2

Why this answer is correct

The correct answer is B. (2). In (2x+3y), the two terms are (2x) and (3y). Identify terms by plus or minus signs.

Step 3

Exam Tip

(2x+3y) में (2x) और (3y) दो पद हैं। पदों को जोड़ या घटाव के चिह्न से अलग पहचानें।

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समीकरण \(x^2=121\) के मूल कौन से हैं?

What are the roots of \(x^2=121\)?

Explanation opens after your attempt
Correct Answer

A. (11) और (-11)(11) and (-11)

Step 1

Concept

From \(x^2=121\), we get \(x=\pm11\). Take both signs while finding square roots.

Step 2

Why this answer is correct

The correct answer is A. (11) और (-11) / (11) and (-11). From \(x^2=121\), we get \(x=\pm11\). Take both signs while finding square roots.

Step 3

Exam Tip

\(x^2=121\) से \(x=\pm11\) मिलता है। वर्गमूल लेते समय दोनों चिन्ह लें।

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समीकरण \(5x^2-45=0\) के मूल कौन से हैं?

What are the roots of \(5x^2-45=0\)?

Explanation opens after your attempt
Correct Answer

A. (3) और (-3)(3) and (-3)

Step 1

Concept

From \(5x^2-45=0\), we get \(x^2=9\). Therefore \(x=\pm3\).

Step 2

Why this answer is correct

The correct answer is A. (3) और (-3) / (3) and (-3). From \(5x^2-45=0\), we get \(x^2=9\). Therefore \(x=\pm3\).

Step 3

Exam Tip

\(5x^2-45=0\) से \(x^2=9\) मिलता है। इसलिए \(x=\pm3\) है।

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समीकरण \(x^2=49\) के मूल कौन से हैं?

What are the roots of \(x^2=49\)?

Explanation opens after your attempt
Correct Answer

A. (7) और (-7)(7) and (-7)

Step 1

Concept

From \(x^2=49\), we get \(x=\pm7\). Take both signs while finding square roots.

Step 2

Why this answer is correct

The correct answer is A. (7) और (-7) / (7) and (-7). From \(x^2=49\), we get \(x=\pm7\). Take both signs while finding square roots.

Step 3

Exam Tip

\(x^2=49\) से \(x=\pm7\) मिलता है। वर्गमूल लेते समय दोनों चिन्ह लें।

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समीकरण \(3x^2-27=0\) के मूल कौन से हैं?

What are the roots of \(3x^2-27=0\)?

Explanation opens after your attempt
Correct Answer

A. (3) और (-3)(3) and (-3)

Step 1

Concept

From \(3x^2-27=0\), we get \(x^2=9\). Therefore \(x=\pm3\).

Step 2

Why this answer is correct

The correct answer is A. (3) और (-3) / (3) and (-3). From \(3x^2-27=0\), we get \(x^2=9\). Therefore \(x=\pm3\).

Step 3

Exam Tip

\(3x^2-27=0\) से \(x^2=9\) मिलता है। इसलिए \(x=\pm3\) है।

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समीकरण \(x^2=16\) के मूल कौन से हैं?

What are the roots of \(x^2=16\)?

Explanation opens after your attempt
Correct Answer

A. (4) और (-4)(4) and (-4)

Step 1

Concept

From \(x^2=16\) we get \(x=\pm4\). In a square equation check both positive and negative roots.

Step 2

Why this answer is correct

The correct answer is A. (4) और (-4) / (4) and (-4). From \(x^2=16\) we get \(x=\pm4\). In a square equation check both positive and negative roots.

Step 3

Exam Tip

\(x^2=16\) से \(x=\pm4\) मिलता है। वर्ग समीकरण में धनात्मक और ऋणात्मक दोनों मूल देखें।

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समीकरण \(2x^2-8=0\) के मूल कौन से हैं?

What are the roots of \(2x^2-8=0\)?

Explanation opens after your attempt
Correct Answer

A. (2) और (-2)(2) and (-2)

Step 1

Concept

From \(2x^2-8=0\) we get \(x^2=4\) so \(x=\pm 2\). Take both signs while finding square roots.

Step 2

Why this answer is correct

The correct answer is A. (2) और (-2) / (2) and (-2). From \(2x^2-8=0\) we get \(x^2=4\) so \(x=\pm 2\). Take both signs while finding square roots.

Step 3

Exam Tip

\(2x^2-8=0\) से \(x^2=4\) मिलता है इसलिए \(x=\pm 2\)। वर्गमूल लेते समय दोनों चिन्ह लें।

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कौन-सा विकल्प \(3-\sqrt{2}\) की प्रकृति सही बताता है?

Which option correctly describes the nature of \(3-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय, क्योंकि परिमेय में से अपरिमेय घटा हैIrrational because an irrational is subtracted from a rational

Step 1

Concept

(3) is rational and \(\sqrt{2}\) is irrational.

Step 2

Why this answer is correct

A rational number minus an irrational number remains irrational.

Step 3

Exam Tip

Do not classify the whole expression by looking only at the rational part. चरण 1: (3) परिमेय है और \(\sqrt{2}\) अपरिमेय है। चरण 2: परिमेय संख्या में से अपरिमेय घटाने पर परिणाम अपरिमेय रहता है। चरण 3: केवल परिमेय पद देखकर पूरे व्यंजक को परिमेय न मानें।

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यदि (r) परिमेय और (s) अपरिमेय है, तो (r-s) कब अपरिमेय होगा?

If (r) is rational and (s) is irrational, when will (r-s) be irrational?

Explanation opens after your attempt
Correct Answer

A. हमेशाAlways

Step 1

Concept

A rational number minus an irrational number is irrational.

Step 2

Why this answer is correct

If (r-s) were rational, then (s=r-(r-s)) would be rational, which is impossible.

Step 3

Exam Tip

Use the same reasoning for subtraction as for addition. चरण 1: परिमेय संख्या में से अपरिमेय संख्या घटाने पर परिणाम अपरिमेय रहता है। चरण 2: यदि (r-s) परिमेय हो, तो (s=r-(r-s)) परिमेय हो जाएगा, जो असंभव है। चरण 3: घटाव में भी वही सोच रखें जो योग में रखते हैं।

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किसी संख्या को (72), (90) और (126) से भाग देने पर क्रमशः शेष (63), (81) और (117) मिलते हैं। ऐसी सबसे छोटी संख्या क्या होगी?

A number leaves remainders (63), (81), and (117) when divided by (72), (90), and (126) respectively. What is the smallest such number?

Explanation opens after your attempt
Correct Answer

A. (2511)

Step 1

Concept

In each case, divisor minus remainder is (9), so adding (9) to the number makes it exactly divisible by all three divisors.

Step 2

Why this answer is correct

The LCM of (72), (90), and (126) is (2520), so the number is (2520-9=2511).

Step 3

Exam Tip

When each remainder is equally less than the divisor, subtract that common difference from the LCM. चरण 1: हर बार भाजक और शेष का अंतर (9) है, इसलिए संख्या में (9) जोड़ने पर वह तीनों भाजकों से पूरी तरह विभाजित होगी। चरण 2: (72), (90) और (126) का लघुत्तम समापवर्त्य (2520) है, इसलिए संख्या (2520-9=2511) होगी। चरण 3: जब शेष भाजक से समान अंतर पर हो, तो लघुत्तम समापवर्त्य से वह अंतर घटाएँ।

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किसी संख्या को (45), (75) और (90) से भाग देने पर क्रमशः शेष (38), (68) और (83) मिलते हैं। ऐसी सबसे छोटी संख्या क्या होगी?

A number leaves remainders (38), (68), and (83) when divided by (45), (75), and (90) respectively. What is the smallest such number?

Explanation opens after your attempt
Correct Answer

A. (443)

Step 1

Concept

In each case, divisor minus remainder is (7), so adding (7) to the number makes it divisible by all three divisors.

Step 2

Why this answer is correct

The LCM of (45), (75), and (90) is (450), so the number is (450-7=443).

Step 3

Exam Tip

Spot the common difference and subtract it from the LCM. चरण 1: हर बार भाजक और शेष का अंतर (7) है, इसलिए संख्या में (7) जोड़ने पर वह तीनों से विभाजित होगी। चरण 2: (45), (75) और (90) का लघुत्तम समापवर्त्य (450) है, इसलिए संख्या (450-7=443) है। चरण 3: ऐसे प्रश्नों में समान अंतर पहचानकर लघुत्तम समापवर्त्य से घटाएँ।

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किसी संख्या को (36), (54) और (90) से भाग देने पर क्रमशः शेष (29), (47) और (83) मिलते हैं। ऐसी सबसे छोटी संख्या क्या होगी?

A number leaves remainders (29), (47), and (83) when divided by (36), (54), and (90) respectively. What is the smallest such number?

Explanation opens after your attempt
Correct Answer

A. (533)

Step 1

Concept

In each case, divisor minus remainder is (7), so adding (7) to the number makes it divisible by all three divisors.

Step 2

Why this answer is correct

The LCM of (36), (54), and (90) is (540), so the number is (540-7=533).

Step 3

Exam Tip

In such questions, identify the common difference and subtract it from the LCM. चरण 1: हर बार भाजक और शेष का अंतर (7) है, इसलिए संख्या में (7) जोड़ने पर वह तीनों संख्याओं से विभाजित होगी। चरण 2: (36), (54) और (90) का लघुत्तम समापवर्त्य (540) है, इसलिए संख्या (540-7=533) है। चरण 3: ऐसे प्रश्नों में समान अंतर पहचानकर लघुत्तम समापवर्त्य से घटाएँ।

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किसी संख्या को (36), (48) और (60) से भाग देने पर क्रमशः शेष (31), (43) और (55) मिलते हैं। ऐसी सबसे छोटी संख्या क्या होगी?

A number leaves remainders (31), (43), and (55) when divided by (36), (48), and (60) respectively. What is the smallest such number?

Explanation opens after your attempt
Correct Answer

A. (715)

Step 1

Concept

In each case, divisor minus remainder is (5), so adding (5) to the number makes it divisible by all three divisors.

Step 2

Why this answer is correct

The LCM of (36), (48), and (60) is (720), so the number is (720-5=715).

Step 3

Exam Tip

When remainders are equally less than divisors, subtract that difference from the LCM. चरण 1: हर स्थिति में भाजक से शेष घटाने पर (5) बचता है, इसलिए संख्या में (5) जोड़ने पर वह तीनों से विभाजित होगी। चरण 2: (36), (48) और (60) का लघुत्तम समापवर्त्य (720) है, इसलिए संख्या (720-5=715) है। चरण 3: जब शेष भाजक से समान अंतर पर हों, तो लघुत्तम समापवर्त्य से वह अंतर घटाएँ।

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यदि \(n=2^5\times3^4\times7\), तो (n) के ऐसे गुणनखंडों की संख्या कितनी है जो (6) से विभाज्य नहीं हैं?

If \(n=2^5\times3^4\times7\), how many factors of (n) are not divisible by (6)?

Explanation opens after your attempt
Correct Answer

A. (22)

Step 1

Concept

Total factors are ((5+1)(4+1)(1+1)=60).

Step 2

Why this answer is correct

Factors divisible by \(6=2\times3\) must have power of (2) at least (1) and power of (3) at least (1), so \(5\times4\times2=40\).

Step 3

Exam Tip

Not divisible by (6) means total minus divisible factors, (60-40=20). चरण 1: कुल गुणनखंड ((5+1)(4+1)(1+1)=60) हैं। चरण 2: \(6=2\times3\) से विभाज्य गुणनखंडों में (2) की घात कम से कम (1) और (3) की घात कम से कम (1) होगी। ऐसे गुणनखंड \(5\times4\times2=40\) हैं। चरण 3: जो (6) से विभाज्य नहीं हैं, वे (60-40=20) नहीं? ध्यान दें (2) के लिए (1) से (5) तक (5) तरीके, (3) के लिए (1) से (4) तक (4) तरीके, (7) के लिए (2) तरीके; इसलिए (40), और उत्तर (60-40=20) है।

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