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80 results found for "radical" in Class 10.

Question Medium Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 30

समीकरण \(x^2+6\sqrt{5}x+45=0\) में (b) का मान क्या है?

What is the value of (b) in \(x^2+6\sqrt{5}x+45=0\)?

Explanation opens after your attempt
Correct Answer

A. \(6\sqrt{5}\)

Step 1

Concept

The coefficient attached to (x) is \(6\sqrt{5}\). Write radical coefficients with their signs too.

Step 2

Why this answer is correct

The correct answer is A. \(6\sqrt{5}\). The coefficient attached to (x) is \(6\sqrt{5}\). Write radical coefficients with their signs too.

Step 3

Exam Tip

(x) के साथ लगा गुणांक \(6\sqrt{5}\) है। करणी वाले गुणांक भी चिन्ह सहित लिखें।

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Question Medium Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 29

समीकरण \(x^2-4\sqrt{2}x+8=0\) में (b) का मान क्या है?

What is the value of (b) in \(x^2-4\sqrt{2}x+8=0\)?

Explanation opens after your attempt
Correct Answer

A. \(-4\sqrt{2}\)

Step 1

Concept

The coefficient attached to (x) is \(-4\sqrt{2}\). Keep the sign with radical coefficients too.

Step 2

Why this answer is correct

The correct answer is A. \(-4\sqrt{2}\). The coefficient attached to (x) is \(-4\sqrt{2}\). Keep the sign with radical coefficients too.

Step 3

Exam Tip

(x) के साथ लगा गुणांक \(-4\sqrt{2}\) है। करणी वाले गुणांक में भी चिन्ह साथ रखें।

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Question Medium Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 29

कौन-सा विकल्प सामान्य रूप में द्विघात समीकरण नहीं है?

Which option is not a quadratic equation in the usual form?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{x}+x=4\)

Step 1

Concept

The term \(\sqrt{x}\) has a fractional power of the variable, so it is not in usual quadratic form. Quadratic form has only \(x^2\), (x), and constant terms.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{x}+x=4\). The term \(\sqrt{x}\) has a fractional power of the variable, so it is not in usual quadratic form. Quadratic form has only \(x^2\), (x), and constant terms.

Step 3

Exam Tip

\(\sqrt{x}\) में चर की भिन्न घात है, इसलिए यह सामान्य द्विघात रूप नहीं है। द्विघात रूप में केवल \(x^2\), (x) और स्थिर पद होते हैं।

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Question Medium Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 28

समीकरण \(x^2+2\sqrt{3}x+3=0\) में (b) का मान क्या है?

What is the value of (b) in \(x^2+2\sqrt{3}x+3=0\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The coefficient attached to (x) is \(2\sqrt{3}\). Radical coefficients are treated like ordinary coefficients.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{3}\). The coefficient attached to (x) is \(2\sqrt{3}\). Radical coefficients are treated like ordinary coefficients.

Step 3

Exam Tip

(x) के साथ लगा गुणांक \(2\sqrt{3}\) है। करणी वाले गुणांक भी सामान्य गुणांक की तरह लिए जाते हैं।

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Question Easy Mathematics Quadratic Equations Introduction to Quadratic Equations Class 10 Level 30

समीकरण \(\sqrt{x}+x^2=0\) को सामान्य रूप में द्विघात क्यों नहीं माना जाता?

Why is \(\sqrt{x}+x^2=0\) not considered a quadratic equation in the usual form?

Explanation opens after your attempt
Correct Answer

D. क्योंकि इसमें \(\sqrt{x}\) पद हैBecause it has a \(\sqrt{x}\) term

Step 1

Concept

The term \(\sqrt{x}\) shows a fractional power of the variable, so it is not in usual quadratic form. A quadratic equation has only \(x^2\), (x), and constant terms.

Step 2

Why this answer is correct

The correct answer is D. क्योंकि इसमें \(\sqrt{x}\) पद है / Because it has a \(\sqrt{x}\) term. The term \(\sqrt{x}\) shows a fractional power of the variable, so it is not in usual quadratic form. A quadratic equation has only \(x^2\), (x), and constant terms.

Step 3

Exam Tip

\(\sqrt{x}\) चर की भिन्न घात दिखाता है इसलिए यह सामान्य द्विघात रूप में नहीं है। द्विघात में केवल \(x^2\), (x) और स्थिर पद होते हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

कौन सा विकल्प (\(\sqrt{14}+\sqrt{6}\)\(\sqrt{14}-\sqrt{6}\)+\sqrt{84}) के बराबर है?

Which option is equal to (\(\sqrt{14}+\sqrt{6}\)\(\sqrt{14}-\sqrt{6}\)+\sqrt{84})?

Explanation opens after your attempt
Correct Answer

A. \(8+2\sqrt{21}\)

Step 1

Concept

The first product is (14-6=8), and \(\sqrt{84}=2\sqrt{21}\). In exams use both conjugate multiplication and radical simplification.

Step 2

Why this answer is correct

The correct answer is A. \(8+2\sqrt{21}\). The first product is (14-6=8), and \(\sqrt{84}=2\sqrt{21}\). In exams use both conjugate multiplication and radical simplification.

Step 3

Exam Tip

पहला गुणनफल (14-6=8) है और \(\sqrt{84}=2\sqrt{21}\) है। परीक्षा में संयुग्मी गुणन और मूल सरलीकरण दोनों करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

किस विकल्प में \(\sqrt{50}+3\sqrt{8}-\sqrt{18}\) का सही सरल रूप है?

Which option gives the correct simplified form of \(\sqrt{50}+3\sqrt{8}-\sqrt{18}\)?

Explanation opens after your attempt
Correct Answer

A. \(8\sqrt{2}\)

Step 1

Concept

\(\sqrt{50}=5\sqrt{2}\), \(3\sqrt{8}=6\sqrt{2}\) and \(\sqrt{18}=3\sqrt{2}\). Hence the value is \(8\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(8\sqrt{2}\). \(\sqrt{50}=5\sqrt{2}\), \(3\sqrt{8}=6\sqrt{2}\) and \(\sqrt{18}=3\sqrt{2}\). Hence the value is \(8\sqrt{2}\).

Step 3

Exam Tip

\(\sqrt{50}=5\sqrt{2}\), \(3\sqrt{8}=6\sqrt{2}\) और \(\sqrt{18}=3\sqrt{2}\) है। इसलिए मान \(8\sqrt{2}\) है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

कौन सा विकल्प \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) के गलत होने का सही प्रतिउदाहरण है?

Which option is a correct counterexample showing that \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) is false?

Explanation opens after your attempt
Correct Answer

A. (a=9) और (b=16)(a=9) and (b=16)

Step 1

Concept

\(\sqrt{9+16}=5\) while \(\sqrt{9}+\sqrt{16}=7\). In exams do not split addition inside a radical.

Step 2

Why this answer is correct

The correct answer is A. (a=9) और (b=16) / (a=9) and (b=16). \(\sqrt{9+16}=5\) while \(\sqrt{9}+\sqrt{16}=7\). In exams do not split addition inside a radical.

Step 3

Exam Tip

\(\sqrt{9+16}=5\) है जबकि \(\sqrt{9}+\sqrt{16}=7\) है। परीक्षा में मूल के अंदर के योग को अलग-अलग न तोड़ें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि \(x=\sqrt{8}-\sqrt{2}\), तो (x) किसके बराबर है?

If \(x=\sqrt{8}-\sqrt{2}\), what is (x) equal to?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{8}-\sqrt{2}=\sqrt{2}\). In exams simplify radicals first.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}\). \(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{8}-\sqrt{2}=\sqrt{2}\). In exams simplify radicals first.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए \(\sqrt{8}-\sqrt{2}=\sqrt{2}\) है। परीक्षा में पहले मूलों को सरल करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि \(a=\sqrt{13}+\sqrt{6}\) और \(b=\sqrt{13}-\sqrt{6}\), तो (ab) का मान क्या है?

If \(a=\sqrt{13}+\sqrt{6}\) and \(b=\sqrt{13}-\sqrt{6}\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

(ab=13-6=7). In exams conjugate multiplication removes radicals.

Step 2

Why this answer is correct

The correct answer is A. (7). (ab=13-6=7). In exams conjugate multiplication removes radicals.

Step 3

Exam Tip

(ab=13-6=7) है। परीक्षा में संयुग्मी गुणन से मूल हट जाते हैं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

किस विकल्प में \(\sqrt{3}\) और \(\sqrt{12}\) का योग परिमेय गुणांक वाले सरल अपरिमेय रूप में सही लिखा गया है?

In which option is the sum of \(\sqrt{3}\) and \(\sqrt{12}\) correctly written as a simple irrational form with rational coefficient?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\), so \(\sqrt{3}+\sqrt{12}=3\sqrt{3}\). In exams make radicals like terms before adding.

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{3}\). \(\sqrt{12}=2\sqrt{3}\), so \(\sqrt{3}+\sqrt{12}=3\sqrt{3}\). In exams make radicals like terms before adding.

Step 3

Exam Tip

\(\sqrt{12}=2\sqrt{3}\), इसलिए \(\sqrt{3}+\sqrt{12}=3\sqrt{3}\) है। परीक्षा में मूलों को जोड़ने से पहले समान मूल बनाएं।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

कौन सा विकल्प अपरिमेय संख्या को परिमेय संख्या की तरह गलत तरीके से सरल करता है?

Which option incorrectly simplifies an irrational number as if it were rational?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) हमेशा\(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) always

Step 1

Concept

\(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) is generally false, for example \(\sqrt{9+16}\ne3+4\). In exams do not split addition inside a radical.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) हमेशा / \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) always. \(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) is generally false, for example \(\sqrt{9+16}\ne3+4\). In exams do not split addition inside a radical.

Step 3

Exam Tip

\(\sqrt{a+b}=\sqrt{a}+\sqrt{b}\) सामान्यतः गलत है, जैसे \(\sqrt{9+16}\ne3+4\)। परीक्षा में मूल के अंदर योग को अलग-अलग न तोड़ें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(\sqrt{12}+\sqrt{27}\) को पहले सरल किया जाए, तो इसका वर्ग क्या होगा?

If \(\sqrt{12}+\sqrt{27}\) is simplified first, what will its square be?

Explanation opens after your attempt
Correct Answer

A. (75)

Step 1

Concept

\(\sqrt{12}+\sqrt{27}=2\sqrt{3}+3\sqrt{3}=5\sqrt{3}\), so the square is (75). In exams add like radicals first.

Step 2

Why this answer is correct

The correct answer is A. (75). \(\sqrt{12}+\sqrt{27}=2\sqrt{3}+3\sqrt{3}=5\sqrt{3}\), so the square is (75). In exams add like radicals first.

Step 3

Exam Tip

\(\sqrt{12}+\sqrt{27}=2\sqrt{3}+3\sqrt{3}=5\sqrt{3}\), इसलिए वर्ग (75) है। परीक्षा में समान मूलों को पहले जोड़ें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

कौन सा विकल्प (\(\sqrt{12}+\sqrt{27}\)2) के बराबर है?

Which option is equal to (\(\sqrt{12}+\sqrt{27}\)2)?

Explanation opens after your attempt
Correct Answer

A. \(75+36\sqrt{3}\)

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\), so the square is (\(5\sqrt{3}\)2=75); none of the expanded radical options except the simplified value idea fits. In exams simplify before expanding.

Step 2

Why this answer is correct

The correct answer is A. \(75+36\sqrt{3}\). \(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\), so the square is (\(5\sqrt{3}\)2=75); none of the expanded radical options except the simplified value idea fits. In exams simplify before expanding.

Step 3

Exam Tip

\(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{27}=3\sqrt{3}\), इसलिए वर्ग (\(5\sqrt{3}\)2=75) होना चाहिए, पर विकल्पों में विस्तार विधि से सही मान (75) अकेला नहीं है। परीक्षा में पहले सरलीकरण करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(a=\sqrt{11}+\sqrt{5}\) और \(b=\sqrt{11}-\sqrt{5}\), तो (ab) क्या होगा?

If \(a=\sqrt{11}+\sqrt{5}\) and \(b=\sqrt{11}-\sqrt{5}\), what is (ab)?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

(ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6). In exams conjugate multiplication removes radicals.

Step 2

Why this answer is correct

The correct answer is A. (6). (ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6). In exams conjugate multiplication removes radicals.

Step 3

Exam Tip

(ab=\(\sqrt{11}\)2-\(\sqrt{5}\)2=11-5=6) है। परीक्षा में संयुग्मी गुणन से मूल हट जाते हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(x=\sqrt{2}\) और \(y=\sqrt{8}\), तो (x:y) का सरल अनुपात क्या है?

If \(x=\sqrt{2}\) and \(y=\sqrt{8}\), what is the simplified ratio (x:y)?

Explanation opens after your attempt
Correct Answer

A. (1:2)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{2}:2\sqrt{2}=1:2\). In exams common radical factors can be cancelled.

Step 2

Why this answer is correct

The correct answer is A. (1:2). \(\sqrt{8}=2\sqrt{2}\), so \(\sqrt{2}:2\sqrt{2}=1:2\). In exams common radical factors can be cancelled.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए \(\sqrt{2}:2\sqrt{2}=1:2\) है। परीक्षा में समान करणी काट सकते हैं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(a=\sqrt{2}+\sqrt{8}\), तो (a) का सरल रूप क्या है और वह किस प्रकार की संख्या है?

If \(a=\sqrt{2}+\sqrt{8}\), what is the simplified form and type of (a)?

Explanation opens after your attempt
Correct Answer

A. \(3\sqrt{2}\), अपरिमेय\(3\sqrt{2}\), irrational

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so \(a=3\sqrt{2}\), irrational. Combine like radicals in exams.

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{2}\), अपरिमेय / \(3\sqrt{2}\), irrational. \(\sqrt{8}=2\sqrt{2}\), so \(a=3\sqrt{2}\), irrational. Combine like radicals in exams.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए \(a=3\sqrt{2}\) अपरिमेय है। परीक्षा में समान करणी वाले पद जोड़ें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(\sqrt{a}+\sqrt{b}\) परिमेय है और (a,b) अलग-अलग अभाज्य संख्याएं हैं, तो सही निष्कर्ष कौन सा है?

If \(\sqrt{a}+\sqrt{b}\) is rational and (a,b) are distinct prime numbers, which conclusion is correct?

Explanation opens after your attempt
Correct Answer

B. यह असंभव हैThis is impossible

Step 1

Concept

Square roots of distinct primes are different irrationals and their sum cannot be rational. In exams do not assume independent radicals can combine to a rational number.

Step 2

Why this answer is correct

The correct answer is B. यह असंभव है / This is impossible. Square roots of distinct primes are different irrationals and their sum cannot be rational. In exams do not assume independent radicals can combine to a rational number.

Step 3

Exam Tip

अलग अभाज्य संख्याओं के वर्गमूल अलग अपरिमेय होते हैं और उनका योग परिमेय नहीं हो सकता। परीक्षा में स्वतंत्र वर्गमूलों को जोड़कर परिमेय न मानें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(x=2+\sqrt{5}\), तो \(x^2-4x-1\) का मान क्या होगा?

If \(x=2+\sqrt{5}\), what is the value of \(x^2-4x-1\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

Since \(x-2=\sqrt{5}\), squaring gives ((x-2)2=5), so \(x^2-4x-1=0\). In exams square to remove the radical.

Step 2

Why this answer is correct

The correct answer is A. (0). Since \(x-2=\sqrt{5}\), squaring gives ((x-2)2=5), so \(x^2-4x-1=0\). In exams square to remove the radical.

Step 3

Exam Tip

\(x-2=\sqrt{5}\), इसलिए ((x-2)2=5) से \(x^2-4x-1=0\) मिलता है। परीक्षा में वर्ग करके अपरिमेय हटाएं।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(x=\sqrt{3}+\sqrt{2}\), तो (x) किस द्विघात समीकरण को संतुष्ट करता है?

If \(x=\sqrt{3}+\sqrt{2}\), which quadratic equation does (x) satisfy?

Explanation opens after your attempt
Correct Answer

C. \(x^4-10x^2+1=0\)

Step 1

Concept

Here \(x^2=5+2\sqrt{6}\) and then (\(x^2-5\)2=24), so \(x^4-10x^2+1=0\). In exams a sum of two radicals may lead to a fourth-degree relation.

Step 2

Why this answer is correct

The correct answer is C. \(x^4-10x^2+1=0\). Here \(x^2=5+2\sqrt{6}\) and then (\(x^2-5\)2=24), so \(x^4-10x^2+1=0\). In exams a sum of two radicals may lead to a fourth-degree relation.

Step 3

Exam Tip

\(x^2=5+2\sqrt{6}\) और फिर (\(x^2-5\)2=24), इसलिए \(x^4-10x^2+1=0\) है। परीक्षा में दो वर्गमूलों के योग से कभी द्विघात नहीं बल्कि चतुर्थ घात संबंध भी बन सकता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि किसी द्विघात बहुपद के शून्यक \(3+\sqrt{5}\) और \(3-\sqrt{5}\) हैं, तो शून्यकों का योग क्या है?

If the zeroes of a quadratic polynomial are \(3+\sqrt{5}\) and \(3-\sqrt{5}\), what is their sum?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

The sum is (\(3+\sqrt{5}\)+\(3-\sqrt{5}\)=6). In conjugate irrationals the radical parts cancel.

Step 2

Why this answer is correct

The correct answer is B. (6). The sum is (\(3+\sqrt{5}\)+\(3-\sqrt{5}\)=6). In conjugate irrationals the radical parts cancel.

Step 3

Exam Tip

योग (\(3+\sqrt{5}\)+\(3-\sqrt{5}\)=6) है। संयुग्मी अपरिमेयों में वर्गमूल भाग कट जाता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-5x+6) है, तो (p\(\sqrt{2}\)) किस प्रकार की संख्या है?

If (p(x)=x-2-5x+6), what type of number is (p\(\sqrt{2}\))?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

(p\(\sqrt{2}\)=2-5\sqrt{2}+6=8-5\sqrt{2}), which is irrational. In exams substitute first and then simplify the radical.

Step 2

Why this answer is correct

The correct answer is B. अपरिमेय / Irrational. (p\(\sqrt{2}\)=2-5\sqrt{2}+6=8-5\sqrt{2}), which is irrational. In exams substitute first and then simplify the radical.

Step 3

Exam Tip

(p\(\sqrt{2}\)=2-5\sqrt{2}+6=8-5\sqrt{2}), जो अपरिमेय है। परीक्षा में पहले प्रतिस्थापन करें फिर वर्गमूल को सरल करें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

कौन सा विकल्प वास्तव में परिमेय संख्या है?

Which option is actually a rational number?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{8}\times\sqrt{18}\)

Step 1

Concept

Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{8}\times\sqrt{18}\). Since \(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), it is rational. In exams simplify products of radicals first.

Step 3

Exam Tip

\(\sqrt{8}\times\sqrt{18}=\sqrt{144}=12\), इसलिए यह परिमेय है। परीक्षा में गुणन में वर्गमूलों को पहले एक साथ सरल करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-\(\sqrt{2}+\sqrt{8}\)x+4) है, तो शून्यकों का योग क्या है?

If (p(x)=x-2-\(\sqrt{2}+\sqrt{8}\)x+4), what is the sum of its zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The sum is \(\sqrt{2}+\sqrt{8}=\sqrt{2}+2\sqrt{2}=3\sqrt{2}\). Simplify radicals before giving the final answer.

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{2}\). The sum is \(\sqrt{2}+\sqrt{8}=\sqrt{2}+2\sqrt{2}=3\sqrt{2}\). Simplify radicals before giving the final answer.

Step 3

Exam Tip

योग \(\sqrt{2}+\sqrt{8}=\sqrt{2}+2\sqrt{2}=3\sqrt{2}\) है। मूलों को सरल करके ही अंतिम उत्तर दें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-(a+b)x+ab) और \(a=\sqrt{2}\), \(b=\sqrt{18}\), तो शून्यकों का गुणनफल क्या है?

If (p(x)=x-2-(a+b)x+ab) and \(a=\sqrt{2}\), \(b=\sqrt{18}\), what is the product of the zeroes?

Explanation opens after your attempt
Correct Answer

A. (6)

Step 1

Concept

The product is \(ab=\sqrt{2}\cdot\sqrt{18}=\sqrt{36}=6\). In radical multiplication, simplify the product inside the root first.

Step 2

Why this answer is correct

The correct answer is A. (6). The product is \(ab=\sqrt{2}\cdot\sqrt{18}=\sqrt{36}=6\). In radical multiplication, simplify the product inside the root first.

Step 3

Exam Tip

गुणनफल \(ab=\sqrt{2}\cdot\sqrt{18}=\sqrt{36}=6\) है। मूलों के गुणन में पहले अंदर के गुणनफल को सरल करें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि \(\sqrt{2}\) और \(-\sqrt{8}\) किसी बहुपद के शून्यक हैं, तो उनके योग का सरल रूप क्या है?

If \(\sqrt{2}\) and \(-\sqrt{8}\) are zeroes of a polynomial, what is the simplified form of their sum?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so the sum is \(\sqrt{2}-2\sqrt{2}=-\sqrt{2}\). Simplifying radicals first reduces mistakes.

Step 2

Why this answer is correct

The correct answer is A. \(-\sqrt{2}\). \(\sqrt{8}=2\sqrt{2}\), so the sum is \(\sqrt{2}-2\sqrt{2}=-\sqrt{2}\). Simplifying radicals first reduces mistakes.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए योग \(\sqrt{2}-2\sqrt{2}=-\sqrt{2}\) है। मूलों को पहले सरल करने से गलती कम होती है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=2x-2-8x+1) है, तो शून्यकों का सही रूप कौन सा है?

If (p(x)=2x-2-8x+1), which is the correct form of its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(2\pm\frac{\sqrt{14}}{2}\)

Step 1

Concept

By the formula, \(x=\frac{8\pm\sqrt{64-8}}{4}=2\pm\frac{\sqrt{14}}{2}\). Divide the whole numerator by the denominator carefully.

Step 2

Why this answer is correct

The correct answer is A. \(2\pm\frac{\sqrt{14}}{2}\). By the formula, \(x=\frac{8\pm\sqrt{64-8}}{4}=2\pm\frac{\sqrt{14}}{2}\). Divide the whole numerator by the denominator carefully.

Step 3

Exam Tip

सूत्र से \(x=\frac{8\pm\sqrt{64-8}}{4}=2\pm\frac{\sqrt{14}}{2}\) है। हर से भाग देते समय पूरे अंश को बाँटें।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि \(\sqrt{3}\) और \(\sqrt{12}\) किसी द्विघात बहुपद के शून्यक हैं, तो एकक बहुपद में (x) का गुणांक क्या होगा?

If \(\sqrt{3}\) and \(\sqrt{12}\) are zeroes of a monic quadratic polynomial, what will be the coefficient of (x)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\), so the sum is \(3\sqrt{3}\). In a monic polynomial, the coefficient of (x) is the negative of the sum of zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(-3\sqrt{3}\). \(\sqrt{12}=2\sqrt{3}\), so the sum is \(3\sqrt{3}\). In a monic polynomial, the coefficient of (x) is the negative of the sum of zeroes.

Step 3

Exam Tip

\(\sqrt{12}=2\sqrt{3}\), इसलिए योग \(3\sqrt{3}\) है। एकक बहुपद में (x) का गुणांक शून्यकों के योग का ऋणात्मक होता है।

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Question Expert Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-10x+17) है, तो शून्यकों के बीच का अंतर क्या है?

If (p(x)=x-2-10x+17), what is the difference between its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{2}\)

Step 1

Concept

The zeroes are \(5\pm2\sqrt{2}\), so the difference is \(4\sqrt{2}\). For conjugate zeroes, the difference is twice the radical part.

Step 2

Why this answer is correct

The correct answer is A. \(4\sqrt{2}\). The zeroes are \(5\pm2\sqrt{2}\), so the difference is \(4\sqrt{2}\). For conjugate zeroes, the difference is twice the radical part.

Step 3

Exam Tip

शून्यक \(5\pm2\sqrt{2}\) हैं, इसलिए अंतर \(4\sqrt{2}\) है। संयुग्मी शून्यकों में अंतर मूल भाग का दोगुना होता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

किस विकल्प में \(\sqrt{12}\) का सही सरल रूप है जो बहुपद के शून्यक सरल करने में उपयोगी है?

Which option gives the correct simplified form of \(\sqrt{12}\), useful in simplifying polynomial zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\). While simplifying zeroes, take square factors outside the radical.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{3}\). \(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\). While simplifying zeroes, take square factors outside the radical.

Step 3

Exam Tip

\(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\) होता है। शून्यक सरल करते समय वर्ग गुणनखंड बाहर निकालें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-12x+31), तो शून्यकों के बीच का अंतर क्या है?

If (p(x)=x-2-12x+31), what is the difference between its zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The zeroes are \(6\pm\sqrt{5}\), so the difference is \(2\sqrt{5}\). The difference of conjugate zeroes is (2) times the radical part.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{5}\). The zeroes are \(6\pm\sqrt{5}\), so the difference is \(2\sqrt{5}\). The difference of conjugate zeroes is (2) times the radical part.

Step 3

Exam Tip

शून्यक \(6\pm\sqrt{5}\) हैं, इसलिए अंतर \(2\sqrt{5}\) है। संयुग्मी शून्यकों का अंतर (2) गुणा मूल पद होता है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-4x-6) है, तो शून्यकों का सही युग्म कौन सा है?

If (p(x)=x-2-4x-6), which is the correct pair of zeroes?

Explanation opens after your attempt
Correct Answer

A. \(2\pm\sqrt{10}\)

Step 1

Concept

By the formula, \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\). Remember \(\sqrt{40}=2\sqrt{10}\) while simplifying (D).

Step 2

Why this answer is correct

The correct answer is A. \(2\pm\sqrt{10}\). By the formula, \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\). Remember \(\sqrt{40}=2\sqrt{10}\) while simplifying (D).

Step 3

Exam Tip

सूत्र से \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\) है। (D) को सरल करने में \(\sqrt{40}=2\sqrt{10}\) याद रखें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि (p(x)=\sqrt{3}x-2-6x+2\sqrt{3}), तो शून्यकों का गुणनफल क्या है?

If (p(x)=\sqrt{3}x-2-6x+2\sqrt{3}), what is the product of its zeroes?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

The product is \(\frac{c}{a}=\frac{2\sqrt{3}}{\sqrt{3}}=2\). Like radicals can cancel.

Step 2

Why this answer is correct

The correct answer is A. (2). The product is \(\frac{c}{a}=\frac{2\sqrt{3}}{\sqrt{3}}=2\). Like radicals can cancel.

Step 3

Exam Tip

गुणनफल \(\frac{c}{a}=\frac{2\sqrt{3}}{\sqrt{3}}=2\) है। समान करणी कट सकती है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

यदि \(\alpha=\sqrt{12}\) और \(\beta=-\sqrt{3}\), तो \(\alpha+\beta\) क्या है?

If \(\alpha=\sqrt{12}\) and \(\beta=-\sqrt{3}\), what is \(\alpha+\beta\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{3}\)

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\), so \(\alpha+\beta=2\sqrt{3}-\sqrt{3}=\sqrt{3}\). Simplifying radicals is important.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{3}\). \(\sqrt{12}=2\sqrt{3}\), so \(\alpha+\beta=2\sqrt{3}-\sqrt{3}=\sqrt{3}\). Simplifying radicals is important.

Step 3

Exam Tip

\(\sqrt{12}=2\sqrt{3}\), इसलिए \(\alpha+\beta=2\sqrt{3}-\sqrt{3}=\sqrt{3}\)। करणी सरल करना जरूरी है।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि \(\sqrt{2}\) और \(\sqrt{8}\) किसी द्विघात बहुपद के शून्यक हैं, तो शून्यकों का योग क्या है?

If \(\sqrt{2}\) and \(\sqrt{8}\) are zeroes of a quadratic polynomial, what is the sum of the zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Since \(\sqrt{8}=2\sqrt{2}\), the sum is \(\sqrt{2}+2\sqrt{2}=3\sqrt{2}\). Simplify radicals first.

Step 2

Why this answer is correct

The correct answer is A. \(3\sqrt{2}\). Since \(\sqrt{8}=2\sqrt{2}\), the sum is \(\sqrt{2}+2\sqrt{2}=3\sqrt{2}\). Simplify radicals first.

Step 3

Exam Tip

क्योंकि \(\sqrt{8}=2\sqrt{2}\), योग \(\sqrt{2}+2\sqrt{2}=3\sqrt{2}\) है। पहले करणी को सरल करें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 28

यदि (p(x)=x-2-mx+9) के शून्यक \(3\sqrt{2}\) और \(\frac{3}{\sqrt{2}}\) हैं, तो (m) क्या होगा?

If zeroes of (p(x)=x-2-mx+9) are \(3\sqrt{2}\) and \(\frac{3}{\sqrt{2}}\), what is (m)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{9\sqrt{2}}{2}\)

Step 1

Concept

The sum is \(3\sqrt{2}+\frac{3}{\sqrt{2}}=\frac{9\sqrt{2}}{2}\). Hence \(m=\frac{9\sqrt{2}}{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{9\sqrt{2}}{2}\). The sum is \(3\sqrt{2}+\frac{3}{\sqrt{2}}=\frac{9\sqrt{2}}{2}\). Hence \(m=\frac{9\sqrt{2}}{2}\).

Step 3

Exam Tip

योग \(3\sqrt{2}+\frac{3}{\sqrt{2}}=\frac{9\sqrt{2}}{2}\) है। इसलिए \(m=\frac{9\sqrt{2}}{2}\) होगा।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

कौन सा विकल्प \(\sqrt{12}+\sqrt{27}+\sqrt{75}-\sqrt{48}\) का सरल रूप है?

Which option is the simplified form of \(\sqrt{12}+\sqrt{27}+\sqrt{75}-\sqrt{48}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

It is \(2\sqrt{3}+3\sqrt{3}+5\sqrt{3}-4\sqrt{3}=6\sqrt{3}\). Add like radical terms.

Step 2

Why this answer is correct

The correct answer is A. \(6\sqrt{3}\). It is \(2\sqrt{3}+3\sqrt{3}+5\sqrt{3}-4\sqrt{3}=6\sqrt{3}\). Add like radical terms.

Step 3

Exam Tip

यह \(2\sqrt{3}+3\sqrt{3}+5\sqrt{3}-4\sqrt{3}=6\sqrt{3}\) है। समान जड़ वाले पद जोड़ें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

कौन सा विकल्प \(2\sqrt{12}-3\sqrt{27}+\sqrt{75}\) का सरल रूप है?

Which option is the simplified form of \(2\sqrt{12}-3\sqrt{27}+\sqrt{75}\)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

It becomes \(4\sqrt{3}-9\sqrt{3}+5\sqrt{3}=0\). First convert all roots to like radical form.

Step 2

Why this answer is correct

The correct answer is A. (0). It becomes \(4\sqrt{3}-9\sqrt{3}+5\sqrt{3}=0\). First convert all roots to like radical form.

Step 3

Exam Tip

यह \(4\sqrt{3}-9\sqrt{3}+5\sqrt{3}=0\) बनता है। पहले सभी जड़ों को समान रूप में बदलें।

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Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि \(a=3+\sqrt{7}\) और \(b=3-\sqrt{7}\) हैं तो \(a^2+b^2\) का मान क्या है?

If \(a=3+\sqrt{7}\) and \(b=3-\sqrt{7}\), what is the value of \(a^2+b^2\)?

Explanation opens after your attempt
Correct Answer

A. (32)

Step 1

Concept

On adding the two squares the radical terms cancel and the result is (32). Identify cancelling terms in conjugates.

Step 2

Why this answer is correct

The correct answer is A. (32). On adding the two squares the radical terms cancel and the result is (32). Identify cancelling terms in conjugates.

Step 3

Exam Tip

दोनों वर्ग जोड़ने पर जड़ वाले पद कट जाते हैं और (32) मिलता है। संयुग्मी संख्याओं में कटने वाले पद पहचानें।

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Question Medium Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

कौन सा विकल्प \(3+\sqrt{8}\) और \(3-\sqrt{8}\) के योग और गुणनफल को सही बताता है?

Which option correctly gives the sum and product of \(3+\sqrt{8}\) and \(3-\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

A. योग (6), गुणनफल (1)Sum (6), product (1)

Step 1

Concept

The radical terms cancel in the sum and the product is (9-8=1). This method is quick for conjugates.

Step 2

Why this answer is correct

The correct answer is A. योग (6), गुणनफल (1) / Sum (6), product (1). The radical terms cancel in the sum and the product is (9-8=1). This method is quick for conjugates.

Step 3

Exam Tip

योग में जड़ वाले पद कटते हैं और गुणनफल (9-8=1) है। संयुग्मी संख्याओं में यह तरीका तेज है।

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Question Medium Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

कौन सा विकल्प \(6\sqrt{3}-2\sqrt{3}+\sqrt{3}\) का सरल रूप है?

Which option is the simplified form of \(6\sqrt{3}-2\sqrt{3}+\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The coefficients of like radical terms are (6-2+1=5). So the answer is \(5\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(5\sqrt{3}\). The coefficients of like radical terms are (6-2+1=5). So the answer is \(5\sqrt{3}\).

Step 3

Exam Tip

समान जड़ वाले पदों के गुणांक (6-2+1=5) बनते हैं। इसलिए उत्तर \(5\sqrt{3}\) है।

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Question Medium Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

कौन सा विकल्प \(2+\sqrt{3}\) और \(2-\sqrt{3}\) के योग और गुणनफल को सही बताता है?

Which option correctly gives the sum and product of \(2+\sqrt{3}\) and \(2-\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. योग (4), गुणनफल (1)Sum (4), product (1)

Step 1

Concept

The radical terms cancel in the sum and the product is (4-3=1). This method is quick for conjugates.

Step 2

Why this answer is correct

The correct answer is A. योग (4), गुणनफल (1) / Sum (4), product (1). The radical terms cancel in the sum and the product is (4-3=1). This method is quick for conjugates.

Step 3

Exam Tip

योग में जड़ वाले पद कटते हैं और गुणनफल (4-3=1) है। संयुग्मी संख्याओं में यह तरीका तेज है।

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Question Medium Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 26

कौन सा विकल्प \(5\sqrt{2}+3\sqrt{2}-\sqrt{2}\) का सरल रूप है?

Which option is the simplified form of \(5\sqrt{2}+3\sqrt{2}-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(7\sqrt{2}\)

Step 1

Concept

The coefficients of like radical terms add as (5+3-1=7). So the answer is \(7\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(7\sqrt{2}\). The coefficients of like radical terms add as (5+3-1=7). So the answer is \(7\sqrt{2}\).

Step 3

Exam Tip

समान जड़ वाले पदों के गुणांक (5+3-1=7) जुड़ते हैं। इसलिए उत्तर \(7\sqrt{2}\) है।

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Question Medium Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि \(y=\sqrt{2}+\sqrt{32}\) है तो (y) का सरल रूप क्या है?

If \(y=\sqrt{2}+\sqrt{32}\), what is the simplified form of (y)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{32}=4\sqrt{2}\), so \(y=5\sqrt{2}\). Add like radical terms.

Step 2

Why this answer is correct

The correct answer is A. \(5\sqrt{2}\). \(\sqrt{32}=4\sqrt{2}\), so \(y=5\sqrt{2}\). Add like radical terms.

Step 3

Exam Tip

\(\sqrt{32}=4\sqrt{2}\) है इसलिए \(y=5\sqrt{2}\) होगा। समान जड़ वाले पदों को जोड़ें।

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Question Easy Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

कौन सा विकल्प \(7\sqrt{3}+2\sqrt{3}\) का सही सरल रूप है?

Which option is the correct simplified form of \(7\sqrt{3}+2\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(9\sqrt{3}\)

Step 1

Concept

The coefficients of like radical terms are added. So \(7\sqrt{3}+2\sqrt{3}=9\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(9\sqrt{3}\). The coefficients of like radical terms are added. So \(7\sqrt{3}+2\sqrt{3}=9\sqrt{3}\).

Step 3

Exam Tip

समान जड़ वाले पदों के गुणांक जुड़ते हैं। इसलिए \(7\sqrt{3}+2\sqrt{3}=9\sqrt{3}\) है।

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Question Easy Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

\(\sqrt{3}+\sqrt{75}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{3}+\sqrt{75}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{75}=5\sqrt{3}\), so the total is \(6\sqrt{3}\). Only like radical terms add directly.

Step 2

Why this answer is correct

The correct answer is A. \(6\sqrt{3}\). \(\sqrt{75}=5\sqrt{3}\), so the total is \(6\sqrt{3}\). Only like radical terms add directly.

Step 3

Exam Tip

\(\sqrt{75}=5\sqrt{3}\) इसलिए कुल \(6\sqrt{3}\) है। समान जड़ वाले पद ही सीधे जुड़ते हैं।

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Question Hard Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

कौन सा कथन \(\sqrt{2}\), \(\sqrt{3}\), और \(\sqrt{5}\) की सिद्धियों में वर्ग करने की भूमिका को गहराई से समझाता है?

Which statement deeply explains the role of squaring in the proofs of \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. वर्ग करने से वर्गमूल हटता है और अभाज्य गुणनखंडों की विभाज्यता पर तर्क संभव होता हैSquaring removes the radical and makes reasoning about prime factor divisibility possible

Step 1

Concept

Squaring \(\sqrt{n}\) gives (n).

Step 2

Why this answer is correct

This forms an equation like \(p^2=nq^2\), which provides the base for divisibility.

Step 3

Exam Tip

Without this step, it is hard to create the common-factor contradiction. चरण 1: \(\sqrt{n}\) को वर्ग करने पर (n) मिलता है। चरण 2: इससे \(p^2=nq^2\) जैसा समीकरण बनता है, जो विभाज्यता का आधार देता है। चरण 3: बिना इस चरण के साझा गुणनखंड वाला विरोधाभास बनाना कठिन होता है।

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Question Medium Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

कौन सा कथन \(\sqrt{5}\) की सिद्धि में सही निष्कर्ष और कारण दोनों देता है?

Which statement gives both the correct conclusion and reason in the proof of \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}\) अपरिमेय है क्योंकि परिमेय मानने पर (p) और (q) दोनों (5) से विभाज्य मिलते हैं\(\sqrt{5}\) is irrational because assuming rational makes both (p) and (q) divisible by (5)

Step 1

Concept

Assuming \(\sqrt{5}\) rational gives \(p^2=5q^2\).

Step 2

Why this answer is correct

This proves both (p) and (q) divisible by (5).

Step 3

Exam Tip

This contradicts coprime condition, so \(\sqrt{5}\) is irrational. चरण 1: \(\sqrt{5}\) को परिमेय मानने पर \(p^2=5q^2\) मिलता है। चरण 2: इससे (p) और (q) दोनों (5) से विभाज्य सिद्ध होते हैं। चरण 3: यह सहअभाज्य शर्त से विरोधाभास है, इसलिए \(\sqrt{5}\) अपरिमेय है।

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Question Medium Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

कौन सा विकल्प \(\sqrt{3}\) के प्रमाण का सही अंतिम निष्कर्ष और कारण दोनों देता है?

Which option gives both the correct final conclusion and reason in the proof of \(\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{3}\) अपरिमेय है क्योंकि परिमेय मानने पर (p) और (q) दोनों (3) से विभाज्य मिलते हैं\(\sqrt{3}\) is irrational because assuming rational makes both (p) and (q) divisible by (3)

Step 1

Concept

Assuming \(\sqrt{3}\) rational gives \(p^2=3q^2\).

Step 2

Why this answer is correct

This proves both (p) and (q) divisible by (3).

Step 3

Exam Tip

This contradicts coprime condition, so \(\sqrt{3}\) is irrational. चरण 1: \(\sqrt{3}\) को परिमेय मानने पर \(p^2=3q^2\) मिलता है। चरण 2: इससे (p) और (q) दोनों (3) से विभाज्य सिद्ध होते हैं। चरण 3: यह सहअभाज्य शर्त से विरोधाभास है, इसलिए \(\sqrt{3}\) अपरिमेय है।

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Question Medium Mathematics Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

\(\sqrt{3}\) के प्रमाण में कौन सा चरण वर्गमूल हटाने के लिए किया जाता है?

In the proof of \(\sqrt{3}\), which step is done to remove the square root?

Explanation opens after your attempt
Correct Answer

A. दोनों ओर वर्ग करनाSquaring both sides

Step 1

Concept

\(\sqrt{3}\) contains a square root.

Step 2

Why this answer is correct

To remove it, we square both sides and get \(3=\frac{p^2}{q^2}\).

Step 3

Exam Tip

Choose the correct algebraic operation to remove the radical. चरण 1: \(\sqrt{3}\) में वर्गमूल मौजूद है। चरण 2: उसे हटाने के लिए दोनों ओर वर्ग किया जाता है, जिससे \(3=\frac{p^2}{q^2}\) मिलता है। चरण 3: वर्गमूल हटाने के लिए सही बीजगणितीय क्रिया चुनें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सी संख्या परिमेय है, जबकि उसमें अपरिमेय वर्गमूल दिखाई दे रहे हैं?

Which number is rational even though irrational square roots appear in it?

Explanation opens after your attempt
Correct Answer

A. (\(\sqrt{6}+\sqrt{2}\)\(\sqrt{6}-\sqrt{2}\))

Step 1

Concept

The first option is a product of conjugate terms.

Step 2

Why this answer is correct

(\(\sqrt{6}+\sqrt{2}\)\(\sqrt{6}-\sqrt{2}\)=6-2=4), which is rational.

Step 3

Exam Tip

Identifying conjugates helps remove radicals quickly. चरण 1: पहला विकल्प संयुग्मी पदों का गुणनफल है। चरण 2: (\(\sqrt{6}+\sqrt{2}\)\(\sqrt{6}-\sqrt{2}\)=6-2=4), जो परिमेय है। चरण 3: संयुग्मी पद पहचानने से वर्गमूल जल्दी हट जाते हैं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{7}+\sqrt{28}\) है तो (x) का सही सरल रूप और प्रकार क्या है?

If \(x=\sqrt{7}+\sqrt{28}\), what is the correct simplified form and type of (x)?

Explanation opens after your attempt
Correct Answer

A. \(3\sqrt{7}\) और अपरिमेय\(3\sqrt{7}\) and irrational

Step 1

Concept

Since \(28=4\cdot 7\), \(\sqrt{28}=2\sqrt{7}\).

Step 2

Why this answer is correct

Now \(\sqrt{7}+2\sqrt{7}=3\sqrt{7}\), and \(\sqrt{7}\) is irrational.

Step 3

Exam Tip

In exams, combine like radicals by adding their coefficients. चरण 1: \(28=4\cdot 7\) इसलिए \(\sqrt{28}=2\sqrt{7}\)। चरण 2: अब \(\sqrt{7}+2\sqrt{7}=3\sqrt{7}\) और \(\sqrt{7}\) अपरिमेय है। चरण 3: परीक्षा में समान वर्गमूल वाले पदों को गुणांक जोड़कर सरल करें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\sqrt{98}-\sqrt{50}\) का सही रूप और प्रकार देता है?

Which option gives the correct form and type of \(\sqrt{98}-\sqrt{50}\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{2}\) और अपरिमेय\(2\sqrt{2}\) and irrational

Step 1

Concept

\(\sqrt{98}=7\sqrt{2}\) and \(\sqrt{50}=5\sqrt{2}\).

Step 2

Why this answer is correct

The difference is \(2\sqrt{2}\), which is irrational.

Step 3

Exam Tip

Directly subtracting numbers inside radicals is wrong. चरण 1: \(\sqrt{98}=7\sqrt{2}\) और \(\sqrt{50}=5\sqrt{2}\)। चरण 2: अंतर \(2\sqrt{2}\) है जो अपरिमेय है। चरण 3: वर्गमूलों के अंदर की संख्याओं को सीधे घटाना गलत है।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा कथन \(\sqrt{2}\cdot \sqrt{3}\) के बारे में सही है?

Which statement is correct about \(\sqrt{2}\cdot \sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

B. यह \(\sqrt{6}\) है और अपरिमेय हैIt is \(\sqrt{6}\) and irrational

Step 1

Concept

The product of radicals is \(\sqrt{2}\cdot \sqrt{3}=\sqrt{6}\).

Step 2

Why this answer is correct

Since (6) is not a perfect square \(\sqrt{6}\) is irrational.

Step 3

Exam Tip

In multiplication the numbers inside radicals multiply, not add. चरण 1: वर्गमूलों का गुणनफल \(\sqrt{2}\cdot \sqrt{3}=\sqrt{6}\) है। चरण 2: (6) पूर्ण वर्ग नहीं है इसलिए \(\sqrt{6}\) अपरिमेय है। चरण 3: गुणन में भीतर की संख्याएं गुणा होती हैं जोड़ नहीं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{3}-\sqrt{2}\) है तो (x) के बारे में सही कथन कौन सा है?

If \(x=\sqrt{3}-\sqrt{2}\) then which statement about (x) is correct?

Explanation opens after your attempt
Correct Answer

B. (x) अपरिमेय है(x) is irrational

Step 1

Concept

Suppose \(\sqrt{3}-\sqrt{2}\) is rational.

Step 2

Why this answer is correct

Squaring gives \(5-2\sqrt{6}\), forcing \(\sqrt{6}\) to be rational which is false.

Step 3

Exam Tip

The difference of unlike radicals is not directly an integer. चरण 1: मान लें \(\sqrt{3}-\sqrt{2}\) परिमेय है। चरण 2: वर्ग करने पर \(5-2\sqrt{6}\) से \(\sqrt{6}\) परिमेय होना पड़ेगा जो गलत है। चरण 3: अलग-अलग वर्गमूलों का अंतर सीधे पूर्णांक नहीं माना जाता।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\sqrt{2}\sqrt{8}+\sqrt{3}\sqrt{12}\) का सही मान देता है?

Which option gives the correct value of \(\sqrt{2}\sqrt{8}+\sqrt{3}\sqrt{12}\)?

Explanation opens after your attempt
Correct Answer

A. (10)

Step 1

Concept

\(\sqrt{2}\sqrt{8}=\sqrt{16}=4\).

Step 2

Why this answer is correct

\(\sqrt{3}\sqrt{12}=\sqrt{36}=6\), so the sum is (10).

Step 3

Exam Tip

In products combine radicals and check for perfect squares. चरण 1: \(\sqrt{2}\sqrt{8}=\sqrt{16}=4\)। चरण 2: \(\sqrt{3}\sqrt{12}=\sqrt{36}=6\) इसलिए योग (10) है। चरण 3: गुणनफल में वर्गमूलों को मिलाकर पूर्ण वर्ग देखें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सी संख्या अपरिमेय है लेकिन उसका वर्ग परिमेय है?

Which number is irrational but its square is rational?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{11}\)

Step 1

Concept

\(\sqrt{11}\) is irrational because (11) is not a perfect square.

Step 2

Why this answer is correct

(\(\sqrt{11}\)2=11) which is rational.

Step 3

Exam Tip

Squaring may remove the radical. चरण 1: \(\sqrt{11}\) अपरिमेय है क्योंकि (11) पूर्ण वर्ग नहीं है। चरण 2: (\(\sqrt{11}\)2=11) परिमेय है। चरण 3: वर्ग करने पर वर्गमूल हट सकता है।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\sqrt{32}+\sqrt{50}-\sqrt{18}\) का सही प्रकार बताता है?

Which option correctly describes \(\sqrt{32}+\sqrt{50}-\sqrt{18}\)?

Explanation opens after your attempt
Correct Answer

A. यह \(6\sqrt{2}\) है और अपरिमेय हैIt is \(6\sqrt{2}\) and irrational

Step 1

Concept

\(\sqrt{32}=4\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{18}=3\sqrt{2}\).

Step 2

Why this answer is correct

The result is \(6\sqrt{2}\) which is irrational.

Step 3

Exam Tip

Add and subtract coefficients of like radicals. चरण 1: \(\sqrt{32}=4\sqrt{2}\) और \(\sqrt{50}=5\sqrt{2}\) और \(\sqrt{18}=3\sqrt{2}\)। चरण 2: परिणाम \(6\sqrt{2}\) है जो अपरिमेय है। चरण 3: समान मूल वाले पदों के गुणांक जोड़ें और घटाएं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\frac{\sqrt{45}}{3}\) का सही प्रकार बताता है?

Which option correctly describes \(\frac{\sqrt{45}}{3}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि यह \(\sqrt{5}\) के बराबर हैIrrational because it equals \(\sqrt{5}\)

Step 1

Concept

\(\sqrt{45}=3\sqrt{5}\).

Step 2

Why this answer is correct

\(\frac{\sqrt{45}}{3}=\sqrt{5}\) which is irrational.

Step 3

Exam Tip

Even after division check the remaining radical. चरण 1: \(\sqrt{45}=3\sqrt{5}\)। चरण 2: \(\frac{\sqrt{45}}{3}=\sqrt{5}\) है जो अपरिमेय है। चरण 3: हर से भाग देने पर भी बचा हुआ वर्गमूल जांचना जरूरी है।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{75}+\sqrt{12}\) किसके बराबर है और उसका प्रकार क्या है?

What is \(\sqrt{75}+\sqrt{12}\) equal to and what is its type?

Explanation opens after your attempt
Correct Answer

A. \(7\sqrt{3}\) और अपरिमेय\(7\sqrt{3}\) and irrational

Step 1

Concept

\(\sqrt{75}=5\sqrt{3}\) and \(\sqrt{12}=2\sqrt{3}\).

Step 2

Why this answer is correct

The sum is \(7\sqrt{3}\) which is irrational.

Step 3

Exam Tip

Simplify radicals before adding them. चरण 1: \(\sqrt{75}=5\sqrt{3}\) और \(\sqrt{12}=2\sqrt{3}\)। चरण 2: योग \(7\sqrt{3}\) है जो अपरिमेय है। चरण 3: अलग-अलग वर्गमूलों को जोड़ने से पहले सरल रूप में बदलें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प (\(\sqrt{3}+1\)\(\sqrt{3}-1\)) का सही मान और प्रकार देता है?

Which option gives the correct value and type of (\(\sqrt{3}+1\)\(\sqrt{3}-1\))?

Explanation opens after your attempt
Correct Answer

A. (2) और परिमेय(2) and rational

Step 1

Concept

This is a difference of squares form.

Step 2

Why this answer is correct

(\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2) which is rational.

Step 3

Exam Tip

Product of conjugates often removes the radical. चरण 1: यह अंतर के वर्ग का रूप है। चरण 2: (\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2) जो परिमेय है। चरण 3: संयुग्मी पदों का गुणनफल अक्सर वर्गमूल हटा देता है।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा कथन \(\sqrt{a}+\sqrt{a}\) के लिए सही है जब (a) पूर्ण वर्ग नहीं है?

Which statement is correct for \(\sqrt{a}+\sqrt{a}\) when (a) is not a perfect square?

Explanation opens after your attempt
Correct Answer

B. यह \(2\sqrt{a}\) के बराबर अपरिमेय हैIt equals \(2\sqrt{a}\) and is irrational

Step 1

Concept

Like terms give \(\sqrt{a}+\sqrt{a}=2\sqrt{a}\).

Step 2

Why this answer is correct

Since (a) is not a perfect square \(\sqrt{a}\) is irrational and its double is irrational.

Step 3

Exam Tip

Add like radicals like algebraic terms. चरण 1: समान पद जोड़ने पर \(\sqrt{a}+\sqrt{a}=2\sqrt{a}\)। चरण 2: (a) पूर्ण वर्ग नहीं है इसलिए \(\sqrt{a}\) अपरिमेय है और उसका दुगुना भी अपरिमेय है। चरण 3: समान वर्गमूलों को बीजगणितीय पदों की तरह जोड़ें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा युग्म दोनों अपरिमेय संख्याएं देता है लेकिन उनका भाग परिमेय है?

Which pair gives two irrational numbers but their quotient is rational?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{18}\) और \(\sqrt{2}\)\(\sqrt{18}\) and \(\sqrt{2}\)

Step 1

Concept

\(\sqrt{18}\) and \(\sqrt{2}\) are both irrational.

Step 2

Why this answer is correct

\(\frac{\sqrt{18}}{\sqrt{2}}=\sqrt{9}=3\) which is rational.

Step 3

Exam Tip

In quotients check whether the ratio inside the radical becomes a perfect square. चरण 1: \(\sqrt{18}\) और \(\sqrt{2}\) दोनों अपरिमेय हैं। चरण 2: \(\frac{\sqrt{18}}{\sqrt{2}}=\sqrt{9}=3\) परिमेय है। चरण 3: भाग में मूल के अंदर अनुपात पूर्ण वर्ग बन रहा है या नहीं यह देखें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{48}\) को सरल करने पर संख्या किस प्रकार की है?

After simplifying \(\sqrt{48}\) what type of number is it?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि \(\sqrt{48}=4\sqrt{3}\)Irrational because \(\sqrt{48}=4\sqrt{3}\)

Step 1

Concept

\(48=16\cdot 3\).

Step 2

Why this answer is correct

\(\sqrt{48}=4\sqrt{3}\) and \(\sqrt{3}\) is irrational.

Step 3

Exam Tip

The square root of an even number need not be rational. चरण 1: \(48=16\cdot 3\) है। चरण 2: \(\sqrt{48}=4\sqrt{3}\) और \(\sqrt{3}\) अपरिमेय है। चरण 3: सम संख्या का वर्गमूल परिमेय होगा यह जरूरी नहीं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\frac{1}{\sqrt{3}}\) के बारे में सही है?

Which option is correct about \(\frac{1}{\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

B. यह अपरिमेय हैIt is irrational

Step 1

Concept

If \(\frac{1}{\sqrt{3}}\) were rational then its reciprocal \(\sqrt{3}\) would be rational.

Step 2

Why this answer is correct

\(\sqrt{3}\) is irrational so the given number is irrational.

Step 3

Exam Tip

A denominator with an irrational radical does not make the value rational automatically. चरण 1: यदि \(\frac{1}{\sqrt{3}}\) परिमेय हो तो उसका व्युत्क्रम \(\sqrt{3}\) भी परिमेय होगा। चरण 2: \(\sqrt{3}\) अपरिमेय है इसलिए दी गई संख्या भी अपरिमेय है। चरण 3: अपरिमेय हर देखकर उसे अपने आप परिमेय न मानें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{2}\) और \(\sqrt{8}\) के बीच संबंध क्या है?

What is the relation between \(\sqrt{2}\) and \(\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

B. दोनों अपरिमेय हैं और \(\sqrt{8}=2\sqrt{2}\)Both are irrational and \(\sqrt{8}=2\sqrt{2}\)

Step 1

Concept

Since \(8=4\cdot 2\) we have \(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

\(\sqrt{2}\) is irrational and its double is also irrational.

Step 3

Exam Tip

Compare like radicals after simplifying them. चरण 1: \(8=4\cdot 2\) है इसलिए \(\sqrt{8}=2\sqrt{2}\)। चरण 2: \(\sqrt{2}\) अपरिमेय है और उसका दुगुना भी अपरिमेय है। चरण 3: समान मूल वाली संख्याओं को सरल रूप में तुलना करें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा मान परिमेय है?

Which value is rational?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{49}\)

Step 1

Concept

The square root of a perfect square is rational.

Step 2

Why this answer is correct

\(\sqrt{49}=7\) so it is rational.

Step 3

Exam Tip

First look for perfect-square factors inside the radical. चरण 1: पूर्ण वर्ग का वर्गमूल परिमेय होता है। चरण 2: \(\sqrt{49}=7\) है इसलिए यह परिमेय है। चरण 3: संख्या के अंदर पूर्ण वर्ग गुणनखंड देखकर सरल करें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\sqrt{96}-\sqrt{54}+\sqrt{24}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{96}-\sqrt{54}+\sqrt{24}\)?

Explanation opens after your attempt
Correct Answer

A. \(5\sqrt{6}\)

Step 1

Concept

\(\sqrt{96}=4\sqrt{6}\), \(\sqrt{54}=3\sqrt{6}\), and \(\sqrt{24}=2\sqrt{6}\).

Step 2

Why this answer is correct

\(4\sqrt{6}-3\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), so the correct value is \(3\sqrt{6}\).

Step 3

Exam Tip

Match the options with your simplified result carefully. चरण 1: \(\sqrt{96}=4\sqrt{6}\), \(\sqrt{54}=3\sqrt{6}\), और \(\sqrt{24}=2\sqrt{6}\)। चरण 2: \(4\sqrt{6}-3\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), इसलिए सही मान \(3\sqrt{6}\) है। चरण 3: विकल्प मिलाते समय अपनी सरल गणना से मिलान करें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\sqrt{a}\times\sqrt{b}\) को अपरिमेय बनाता है?

Which option makes \(\sqrt{a}\times\sqrt{b}\) irrational?

Explanation opens after your attempt
Correct Answer

D. (a=6,b=15)

Step 1

Concept

\(\sqrt{a}\times\sqrt{b}=\sqrt{ab}\).

Step 2

Why this answer is correct

For (a=6,b=15), (ab=90), which is not a perfect square, so \(\sqrt{90}\) is irrational.

Step 3

Exam Tip

In multiplication, the key check is whether the product inside the root is a perfect square. चरण 1: \(\sqrt{a}\times\sqrt{b}=\sqrt{ab}\) होता है। चरण 2: (a=6,b=15) पर (ab=90), जो पूर्ण वर्ग नहीं है, इसलिए \(\sqrt{90}\) अपरिमेय है। चरण 3: गुणन में अंदर का गुणनफल पूर्ण वर्ग है या नहीं, यह मुख्य जाँच है।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(\sqrt{18}+\sqrt{50}-\sqrt{8}\) का सही सरल रूप है?

Which option is the correct simplified form of \(\sqrt{18}+\sqrt{50}-\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

A. \(6\sqrt{2}\)

Step 1

Concept

\(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), and \(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

\(3\sqrt{2}+5\sqrt{2}-2\sqrt{2}=6\sqrt{2}\).

Step 3

Exam Tip

Keep the signs carefully while adding or subtracting coefficients. चरण 1: \(\sqrt{18}=3\sqrt{2}\), \(\sqrt{50}=5\sqrt{2}\), और \(\sqrt{8}=2\sqrt{2}\)। चरण 2: \(3\sqrt{2}+5\sqrt{2}-2\sqrt{2}=6\sqrt{2}\)। चरण 3: चिह्नों को ध्यान से रखकर गुणांक जोड़ें या घटाएँ।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(\sqrt{48}+\sqrt{75}-\sqrt{27}\) को सरल करके देता है?

Which option gives the simplified form of \(\sqrt{48}+\sqrt{75}-\sqrt{27}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{48}=4\sqrt{3}\), \(\sqrt{75}=5\sqrt{3}\), and \(\sqrt{27}=3\sqrt{3}\).

Step 2

Why this answer is correct

\(4\sqrt{3}+5\sqrt{3}-3\sqrt{3}=6\sqrt{3}\).

Step 3

Exam Tip

For like surds, work with the coefficients. चरण 1: \(\sqrt{48}=4\sqrt{3}\), \(\sqrt{75}=5\sqrt{3}\), और \(\sqrt{27}=3\sqrt{3}\)। चरण 2: \(4\sqrt{3}+5\sqrt{3}-3\sqrt{3}=6\sqrt{3}\)। चरण 3: एक ही मूल वाले पदों में गुणांकों पर काम करें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(\sqrt{3}\) और \(\sqrt{12}\) के बीच संबंध सही बताता है?

Which option correctly states the relation between \(\sqrt{3}\) and \(\sqrt{12}\)?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{12}=2\sqrt{3}\)

Step 1

Concept

\(12=4\times3\).

Step 2

Why this answer is correct

\(\sqrt{12}=\sqrt{4}\sqrt{3}=2\sqrt{3}\).

Step 3

Exam Tip

Take the perfect square factor outside the radical. चरण 1: \(12=4\times3\) है। चरण 2: \(\sqrt{12}=\sqrt{4}\sqrt{3}=2\sqrt{3}\)। चरण 3: पूर्ण वर्ग गुणनखंड को मूल से बाहर निकालें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(x=3+\sqrt{8}\), तो (x) की प्रकृति और सरल रूप के बारे में सही कथन कौन-सा है?

If \(x=3+\sqrt{8}\), which statement about the nature and simplified form of (x) is correct?

Explanation opens after your attempt
Correct Answer

A. \(x=3+2\sqrt{2}\), अपरिमेय\(x=3+2\sqrt{2}\), irrational

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

So \(x=3+2\sqrt{2}\), which contains an irrational part.

Step 3

Exam Tip

Do not combine rational and irrational terms into a single radical. चरण 1: \(\sqrt{8}=2\sqrt{2}\) है। चरण 2: इसलिए \(x=3+2\sqrt{2}\), जिसमें अपरिमेय भाग है। चरण 3: परिमेय और अपरिमेय पदों को सीधे जोड़कर एक मूल न बनाएं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(\frac{\sqrt{18}}{\sqrt{5}}\) की प्रकृति सही बताता है?

Which option correctly describes the nature of \(\frac{\sqrt{18}}{\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय, क्योंकि \(\frac{18}{5}\) पूर्ण वर्ग नहीं हैIrrational because \(\frac{18}{5}\) is not a perfect square

Step 1

Concept

\(\frac{\sqrt{18}}{\sqrt{5}}=\sqrt{\frac{18}{5}}\).

Step 2

Why this answer is correct

\(\frac{18}{5}\) is not a perfect square of a rational number, so the result is irrational.

Step 3

Exam Tip

In quotients of radicals, check whether the fraction inside is a perfect square. चरण 1: \(\frac{\sqrt{18}}{\sqrt{5}}=\sqrt{\frac{18}{5}}\) है। चरण 2: \(\frac{18}{5}\) किसी परिमेय संख्या का पूर्ण वर्ग नहीं है, इसलिए परिणाम अपरिमेय है। चरण 3: भाग वाले मूलों में अंदर के भिन्न को पूर्ण वर्ग है या नहीं, यह देखें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

किस विकल्प में \(\frac{\sqrt{a}}{\sqrt{b}}\) अपरिमेय है?

In which option is \(\frac{\sqrt{a}}{\sqrt{b}}\) irrational?

Explanation opens after your attempt
Correct Answer

B. (a=50,b=2)

Step 1

Concept

\(\frac{\sqrt{a}}{\sqrt{b}}=\sqrt{\frac{a}{b}}\).

Step 2

Why this answer is correct

For (a=50,b=2), it becomes \(\sqrt{25}=5\), which is rational, so it should not be selected.

Step 3

Exam Tip

For an irrational quotient, \(\frac{a}{b}\) should not be a perfect square; none of the listed options gives that. चरण 1: \(\frac{\sqrt{a}}{\sqrt{b}}=\sqrt{\frac{a}{b}}\) है। चरण 2: (a=50,b=2) पर \(\sqrt{\frac{50}{2}}=\sqrt{25}=5\), यह परिमेय है; इसलिए इसे नहीं चुनना चाहिए। चरण 3: सही अपरिमेय के लिए भागफल पूर्ण वर्ग न हो, जैसे यहाँ दिए विकल्पों में कोई अपरिमेय परिणाम नहीं बनता।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(a=\sqrt{8}+\sqrt{18}\) और \(b=\sqrt{8}-\sqrt{18}\), तो (ab) का मान क्या है?

If \(a=\sqrt{8}+\sqrt{18}\) and \(b=\sqrt{8}-\sqrt{18}\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (-10)

Step 1

Concept

(ab=\(\sqrt{8}\)2-\(\sqrt{18}\)2).

Step 2

Why this answer is correct

(ab=8-18=-10), which is rational.

Step 3

Exam Tip

In conjugate multiplication, you do not always need to simplify each radical first. चरण 1: (ab=\(\sqrt{8}\)2-\(\sqrt{18}\)2) है। चरण 2: (ab=8-18=-10), जो परिमेय है। चरण 3: संयुग्मी गुणन में मूलों को अलग-अलग सरल करना जरूरी नहीं होता।

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Question Hard Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन-सा विकल्प \(\sqrt{a}\times\sqrt{b}\) को परिमेय बनाने के लिए सही उदाहरण है?

Which option is a correct example that makes \(\sqrt{a}\times\sqrt{b}\) rational?

Explanation opens after your attempt
Correct Answer

B. (a=3,b=12)

Step 1

Concept

\(\sqrt{a}\times\sqrt{b}=\sqrt{ab}\).

Step 2

Why this answer is correct

For (a=3,b=12), (ab=36), so \(\sqrt{36}=6\), which is rational.

Step 3

Exam Tip

Check whether the product inside the radical becomes a perfect square. चरण 1: \(\sqrt{a}\times\sqrt{b}=\sqrt{ab}\) होता है। चरण 2: (a=3,b=12) पर (ab=36), इसलिए \(\sqrt{36}=6\), जो परिमेय है। चरण 3: गुणन के बाद अंदर की संख्या पूर्ण वर्ग बन रही है या नहीं, यह देखें।

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Question Hard Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

निम्न में से कौन-सा व्यंजक परिमेय नहीं है?

Which of the following expressions is not rational?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{6}+\sqrt{24}\)

Step 1

Concept

Simplify each option first.

Step 2

Why this answer is correct

\(\sqrt{6}+\sqrt{24}=\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), which is irrational.

Step 3

Exam Tip

Radicals may cancel in multiplication, but not always in addition. चरण 1: पहले प्रत्येक विकल्प को सरल करें। चरण 2: \(\sqrt{6}+\sqrt{24}=\sqrt{6}+2\sqrt{6}=3\sqrt{6}\), जो अपरिमेय है। चरण 3: गुणन में मूल कट सकते हैं, पर योग में हमेशा ऐसा नहीं होता।

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Question Hard Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन-सा विकल्प \(\frac{\sqrt{27}}{\sqrt{3}}\) का सही मान देता है?

Which option gives the correct value of \(\frac{\sqrt{27}}{\sqrt{3}}\)?

Explanation opens after your attempt
Correct Answer

B. \(\sqrt{9}\) और इसलिए (3)\(\sqrt{9}\) and hence (3)

Step 1

Concept

\(\frac{\sqrt{27}}{\sqrt{3}}=\sqrt{\frac{27}{3}}\).

Step 2

Why this answer is correct

This is \(\sqrt{9}=3\), which is rational.

Step 3

Exam Tip

In division, simplifying the radicals together is a quick method. चरण 1: \(\frac{\sqrt{27}}{\sqrt{3}}=\sqrt{\frac{27}{3}}\) लिखा जा सकता है। चरण 2: यह \(\sqrt{9}=3\) है, जो परिमेय है। चरण 3: भाग में मूलों को एक साथ सरल करना जल्दी तरीका है।

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Question Hard Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=2-\sqrt{3}\), तो \(\frac{1}{x}\) का परिमेय हर वाला रूप क्या है?

If \(x=2-\sqrt{3}\), what is the rationalized form of \(\frac{1}{x}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The conjugate of the denominator in \(\frac{1}{2-\sqrt{3}}\) is \(2+\sqrt{3}\).

Step 2

Why this answer is correct

\(\frac{1}{2-\sqrt{3}}\times\frac{2+\sqrt{3}}{2+\sqrt{3}}=\frac{2+\sqrt{3}}{4-3}=2+\sqrt{3}\).

Step 3

Exam Tip

Multiplying by the conjugate removes the radical from the denominator. चरण 1: \(\frac{1}{2-\sqrt{3}}\) में हर का संयुग्मी \(2+\sqrt{3}\) है। चरण 2: \(\frac{1}{2-\sqrt{3}}\times\frac{2+\sqrt{3}}{2+\sqrt{3}}=\frac{2+\sqrt{3}}{4-3}=2+\sqrt{3}\)। चरण 3: हर में संयुग्मी से गुणा करने पर मूल हट जाता है।

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