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Class 9 Mathematics Expert Quiz

Level 19 • 50/50 questions • 25 seconds per question.

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कौन-सा कथन \(\frac{13}{40}\) के दशमलव प्रसार के बारे में सही है?

Which statement is correct about the decimal expansion of \(\frac{13}{40}\)?

Explanation opens after your attempt
Correct Answer

A. यह सांत है क्योंकि हर का अभाज्य गुणनखंड केवल (2) और (5) हैंIt is terminating because the denominator has only (2) and (5) as prime factors

Step 1

Concept

\(40=2^3\times5\), so the decimal will terminate. In exams, check the prime factors of the denominator.

Step 2

Why this answer is correct

The correct answer is A. यह सांत है क्योंकि हर का अभाज्य गुणनखंड केवल (2) और (5) हैं / It is terminating because the denominator has only (2) and (5) as prime factors. \(40=2^3\times5\), so the decimal will terminate. In exams, check the prime factors of the denominator.

Step 3

Exam Tip

\(40=2^3\times5\), इसलिए दशमलव सांत होगा। परीक्षा में हर के अभाज्य गुणनखंड जाँचें।

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यदि \(\frac{p}{q}\) सरल रूप में है और \(q=2^3\times3\) है, तो उसका दशमलव प्रसार कैसा होगा?

If \(\frac{p}{q}\) is in simplest form and \(q=2^3\times3\), what will its decimal expansion be?

Explanation opens after your attempt
Correct Answer

B. असांत आवर्तीNon-terminating recurring

Step 1

Concept

The denominator contains (3), which is not (2) or (5). Therefore the decimal is non-terminating recurring.

Step 2

Why this answer is correct

The correct answer is B. असांत आवर्ती / Non-terminating recurring. The denominator contains (3), which is not (2) or (5). Therefore the decimal is non-terminating recurring.

Step 3

Exam Tip

हर में (3) है, जो (2) या (5) नहीं है। इसलिए दशमलव असांत आवर्ती होगा।

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\(\sqrt{72}\) को सरलतम रूप में लिखने पर क्या मिलेगा?

What is the simplest form of \(\sqrt{72}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(72=36\times2\), so \(\sqrt{72}=6\sqrt{2}\). Take out the largest perfect square.

Step 2

Why this answer is correct

The correct answer is A. \(6\sqrt{2}\). \(72=36\times2\), so \(\sqrt{72}=6\sqrt{2}\). Take out the largest perfect square.

Step 3

Exam Tip

\(72=36\times2\), इसलिए \(\sqrt{72}=6\sqrt{2}\)। बड़े पूर्ण वर्ग को बाहर निकालें।

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\(\sqrt{2}\) और \(\sqrt{8}\) का गुणनफल किस प्रकार की संख्या है?

What type of number is the product of \(\sqrt{2}\) and \(\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

B. परिमेय संख्याRational number

Step 1

Concept

\(\sqrt{2}\times\sqrt{8}=\sqrt{16}=4\), which is rational. The product of two irrational numbers is not always irrational.

Step 2

Why this answer is correct

The correct answer is B. परिमेय संख्या / Rational number. \(\sqrt{2}\times\sqrt{8}=\sqrt{16}=4\), which is rational. The product of two irrational numbers is not always irrational.

Step 3

Exam Tip

\(\sqrt{2}\times\sqrt{8}=\sqrt{16}=4\), जो परिमेय है। दो अपरिमेय संख्याओं का गुणनफल हमेशा अपरिमेय नहीं होता।

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

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

Explanation opens after your attempt
Correct Answer

C. यह असांत अनावर्ती दशमलव हैIt is a non-terminating non-recurring decimal

Step 1

Concept

\(\sqrt{3}\) is irrational, so its decimal is non-terminating non-recurring. Identify perfect squares in square roots.

Step 2

Why this answer is correct

The correct answer is C. यह असांत अनावर्ती दशमलव है / It is a non-terminating non-recurring decimal. \(\sqrt{3}\) is irrational, so its decimal is non-terminating non-recurring. Identify perfect squares in square roots.

Step 3

Exam Tip

\(\sqrt{3}\) अपरिमेय है, इसलिए इसका दशमलव असांत अनावर्ती होता है। वर्गमूल में पूर्ण वर्ग पहचानें।

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\(\frac{7}{2^2\times5^3}\) का दशमलव प्रसार कितने दशमलव स्थानों तक सांत होगा?

The decimal expansion of \(\frac{7}{2^2\times5^3}\) will terminate after how many decimal places?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

The denominator has \(2^2\) and \(5^3\), so the larger power is (3). The decimal terminates after (3) places.

Step 2

Why this answer is correct

The correct answer is B. (3). The denominator has \(2^2\) and \(5^3\), so the larger power is (3). The decimal terminates after (3) places.

Step 3

Exam Tip

हर में \(2^2\) और \(5^3\) हैं, इसलिए अधिक घात (3) है। दशमलव (3) स्थानों तक सांत होगा।

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\(\sqrt{5}+\sqrt{20}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{5}+\sqrt{20}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{20}=2\sqrt{5}\), so \(\sqrt{5}+2\sqrt{5}=3\sqrt{5}\). Add like surd terms.

Step 2

Why this answer is correct

The correct answer is B. \(3\sqrt{5}\). \(\sqrt{20}=2\sqrt{5}\), so \(\sqrt{5}+2\sqrt{5}=3\sqrt{5}\). Add like surd terms.

Step 3

Exam Tip

\(\sqrt{20}=2\sqrt{5}\), इसलिए \(\sqrt{5}+2\sqrt{5}=3\sqrt{5}\)। समान करणी पदों को जोड़ें।

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कौन-सी संख्या परिमेय है लेकिन पूर्णांक नहीं है?

Which number is rational but not an integer?

Explanation opens after your attempt
Correct Answer

C. \(\frac{9}{4}\)

Step 1

Concept

\(\frac{9}{4}\) is rational but not an integer. A fraction with non-zero denominator is rational.

Step 2

Why this answer is correct

The correct answer is C. \(\frac{9}{4}\). \(\frac{9}{4}\) is rational but not an integer. A fraction with non-zero denominator is rational.

Step 3

Exam Tip

\(\frac{9}{4}\) परिमेय है लेकिन पूर्णांक नहीं है। हर शून्य न हो तो भिन्न परिमेय होती है।

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\(\frac{1}{7}\) का दशमलव प्रसार कैसा होता है?

What type of decimal expansion does \(\frac{1}{7}\) have?

Explanation opens after your attempt
Correct Answer

B. असांत आवर्तीNon-terminating recurring

Step 1

Concept

The denominator (7) is neither (2) nor (5), so the decimal is non-terminating recurring. It is still rational.

Step 2

Why this answer is correct

The correct answer is B. असांत आवर्ती / Non-terminating recurring. The denominator (7) is neither (2) nor (5), so the decimal is non-terminating recurring. It is still rational.

Step 3

Exam Tip

(7) हर में (2) या (5) नहीं है, इसलिए दशमलव असांत आवर्ती होगा। यह फिर भी परिमेय संख्या है।

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\(\sqrt{98}-\sqrt{50}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{98}-\sqrt{50}\)?

Explanation opens after your attempt
Correct Answer

B. \(2\sqrt{2}\)

Step 1

Concept

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

Step 2

Why this answer is correct

The correct answer is B. \(2\sqrt{2}\). \(\sqrt{98}=7\sqrt{2}\) and \(\sqrt{50}=5\sqrt{2}\). The difference is \(2\sqrt{2}\).

Step 3

Exam Tip

\(\sqrt{98}=7\sqrt{2}\) और \(\sqrt{50}=5\sqrt{2}\)। अंतर \(2\sqrt{2}\) है।

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कौन-सा कथन वास्तविक संख्याओं के बारे में सही है?

Which statement about real numbers is correct?

Explanation opens after your attempt
Correct Answer

B. हर अपरिमेय संख्या वास्तविक संख्या होती हैEvery irrational number is a real number

Step 1

Concept

Real numbers include both rational and irrational numbers. Therefore every irrational number is real.

Step 2

Why this answer is correct

The correct answer is B. हर अपरिमेय संख्या वास्तविक संख्या होती है / Every irrational number is a real number. Real numbers include both rational and irrational numbers. Therefore every irrational number is real.

Step 3

Exam Tip

वास्तविक संख्याओं में परिमेय और अपरिमेय दोनों शामिल होते हैं। इसलिए हर अपरिमेय संख्या वास्तविक है।

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यदि \(a=\sqrt{6}\) और \(b=\sqrt{24}\), तो (b) किसके बराबर है?

If \(a=\sqrt{6}\) and \(b=\sqrt{24}\), then what is (b) equal to?

Explanation opens after your attempt
Correct Answer

A. (2a)

Step 1

Concept

\(\sqrt{24}=\sqrt{4\times6}=2\sqrt{6}=2a\). Identify the common surd.

Step 2

Why this answer is correct

The correct answer is A. (2a). \(\sqrt{24}=\sqrt{4\times6}=2\sqrt{6}=2a\). Identify the common surd.

Step 3

Exam Tip

\(\sqrt{24}=\sqrt{4\times6}=2\sqrt{6}=2a\)। समान करणी को पहचानें।

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\(\frac{3}{2^4\times5^2}\) को दशमलव में बदलने पर कितने दशमलव स्थान होंगे?

How many decimal places will \(\frac{3}{2^4\times5^2}\) have when converted into decimal?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

The highest power of (2) in the denominator is (4). After making \(5^2\) into \(5^4\), the decimal has (4) places.

Step 2

Why this answer is correct

The correct answer is B. (4). The highest power of (2) in the denominator is (4). After making \(5^2\) into \(5^4\), the decimal has (4) places.

Step 3

Exam Tip

हर में (2) की अधिकतम घात (4) है। \(5^2\) को \(5^4\) बनाने के बाद दशमलव (4) स्थानों तक होगा।

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कौन-सा विकल्प \(\sqrt{18}\) और (4) की तुलना सही करता है?

Which option correctly compares \(\sqrt{18}\) and (4)?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{18}>4\)

Step 1

Concept

Because \(18>16=4^2\), so \(\sqrt{18}>4\). Square both sides for comparison.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{18}>4\). Because \(18>16=4^2\), so \(\sqrt{18}>4\). Square both sides for comparison.

Step 3

Exam Tip

क्योंकि \(18>16=4^2\), इसलिए \(\sqrt{18}>4\)। तुलना के लिए दोनों ओर वर्ग करें।

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कौन-सा विकल्प परिमेय और अपरिमेय संख्याओं के योग के बारे में सही है?

Which option is correct about the sum of a rational and an irrational number?

Explanation opens after your attempt
Correct Answer

B. हमेशा अपरिमेयAlways irrational

Step 1

Concept

The sum of a rational and an irrational number is always irrational. Example is \(\sqrt{2}+3\).

Step 2

Why this answer is correct

The correct answer is B. हमेशा अपरिमेय / Always irrational. The sum of a rational and an irrational number is always irrational. Example is \(\sqrt{2}+3\).

Step 3

Exam Tip

परिमेय और अपरिमेय संख्या का योग हमेशा अपरिमेय होता है। उदाहरण \(\sqrt{2}+3\) है।

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\(\sqrt{45}+\sqrt{80}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{45}+\sqrt{80}\)?

Explanation opens after your attempt
Correct Answer

A. \(7\sqrt{5}\)

Step 1

Concept

\(\sqrt{45}=3\sqrt{5}\) and \(\sqrt{80}=4\sqrt{5}\). The sum is \(7\sqrt{5}\).

Step 2

Why this answer is correct

The correct answer is A. \(7\sqrt{5}\). \(\sqrt{45}=3\sqrt{5}\) and \(\sqrt{80}=4\sqrt{5}\). The sum is \(7\sqrt{5}\).

Step 3

Exam Tip

\(\sqrt{45}=3\sqrt{5}\) और \(\sqrt{80}=4\sqrt{5}\)। योग \(7\sqrt{5}\) है।

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कौन-सी संख्या \(\frac{p}{q}\) रूप में लिखी जा सकती है, जहाँ (p) और (q) पूर्णांक हैं और \(q\ne0\)?

Which number can be written in the form \(\frac{p}{q}\), where (p) and (q) are integers and \(q\ne0\)?

Explanation opens after your attempt
Correct Answer

C. \(0.\overline{37}\)

Step 1

Concept

A recurring decimal is rational. Therefore \(0.\overline{37}\) can be written in \(\frac{p}{q}\) form.

Step 2

Why this answer is correct

The correct answer is C. \(0.\overline{37}\). A recurring decimal is rational. Therefore \(0.\overline{37}\) can be written in \(\frac{p}{q}\) form.

Step 3

Exam Tip

आवर्ती दशमलव परिमेय होता है। इसलिए \(0.\overline{37}\) को \(\frac{p}{q}\) रूप में लिखा जा सकता है।

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\(\sqrt{7}\) को संख्या रेखा पर रखने से पहले कौन-सा अंतराल पहचानना चाहिए?

Which interval should be identified before placing \(\sqrt{7}\) on the number line?

Explanation opens after your attempt
Correct Answer

B. \(2<\sqrt{7}<3\)

Step 1

Concept

Because \(2^2<7<3^2\). Therefore \(\sqrt{7}\) lies between (2) and (3).

Step 2

Why this answer is correct

The correct answer is B. \(2<\sqrt{7}<3\). Because \(2^2<7<3^2\). Therefore \(\sqrt{7}\) lies between (2) and (3).

Step 3

Exam Tip

क्योंकि \(2^2<7<3^2\) है। इसलिए \(\sqrt{7}\) (2) और (3) के बीच होगा।

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यदि (x=0.101001000100001...) है, तो (x) किस प्रकार की संख्या है?

If (x=0.101001000100001...), what type of number is (x)?

Explanation opens after your attempt
Correct Answer

C. अपरिमेय क्योंकि दशमलव असांत अनावर्ती हैIrrational because the decimal is non-terminating non-recurring

Step 1

Concept

The decimal continues and has no fixed repetition. Such decimals are irrational.

Step 2

Why this answer is correct

The correct answer is C. अपरिमेय क्योंकि दशमलव असांत अनावर्ती है / Irrational because the decimal is non-terminating non-recurring. The decimal continues and has no fixed repetition. Such decimals are irrational.

Step 3

Exam Tip

दशमलव चलता रहता है और कोई निश्चित आवृत्ति नहीं है। ऐसे दशमलव अपरिमेय होते हैं।

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\(\frac{17}{125}\) का दशमलव प्रसार कैसा होगा?

What type of decimal expansion will \(\frac{17}{125}\) have?

Explanation opens after your attempt
Correct Answer

A. सांतTerminating

Step 1

Concept

\(125=5^3\), so the denominator has only (5). The decimal will terminate.

Step 2

Why this answer is correct

The correct answer is A. सांत / Terminating. \(125=5^3\), so the denominator has only (5). The decimal will terminate.

Step 3

Exam Tip

\(125=5^3\), इसलिए हर में केवल (5) है। दशमलव सांत होगा।

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\(\sqrt{147}\) को सरल करने पर क्या मिलता है?

What is obtained after simplifying \(\sqrt{147}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(147=49\times3\), so \(\sqrt{147}=7\sqrt{3}\). Take the perfect square outside.

Step 2

Why this answer is correct

The correct answer is A. \(7\sqrt{3}\). \(147=49\times3\), so \(\sqrt{147}=7\sqrt{3}\). Take the perfect square outside.

Step 3

Exam Tip

\(147=49\times3\), इसलिए \(\sqrt{147}=7\sqrt{3}\)। पूर्ण वर्ग को बाहर निकालें।

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कौन-सा कथन \(\sqrt{2}+\sqrt{8}\) के बारे में सही है?

Which statement about \(\sqrt{2}+\sqrt{8}\) is correct?

Explanation opens after your attempt
Correct Answer

A. यह \(3\sqrt{2}\) हैIt is \(3\sqrt{2}\)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\), so the sum is \(3\sqrt{2}\). Do not directly add numbers inside roots.

Step 2

Why this answer is correct

The correct answer is A. यह \(3\sqrt{2}\) है / It is \(3\sqrt{2}\). \(\sqrt{8}=2\sqrt{2}\), so the sum is \(3\sqrt{2}\). Do not directly add numbers inside roots.

Step 3

Exam Tip

\(\sqrt{8}=2\sqrt{2}\), इसलिए योग \(3\sqrt{2}\) है। वर्गमूलों को सीधे अंदर जोड़ना गलत है।

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\(\frac{5}{6}\) का दशमलव प्रसार सांत क्यों नहीं है?

Why is the decimal expansion of \(\frac{5}{6}\) not terminating?

Explanation opens after your attempt
Correct Answer

A. क्योंकि \(6=2\times3\) और हर में (3) हैBecause \(6=2\times3\) and the denominator contains (3)

Step 1

Concept

Since the denominator in simplest form contains (3), the decimal is non-terminating recurring. A terminating decimal needs only (2) and (5).

Step 2

Why this answer is correct

The correct answer is A. क्योंकि \(6=2\times3\) और हर में (3) है / Because \(6=2\times3\) and the denominator contains (3). Since the denominator in simplest form contains (3), the decimal is non-terminating recurring. A terminating decimal needs only (2) and (5).

Step 3

Exam Tip

सरल रूप में हर में (3) होने से दशमलव असांत आवर्ती होगा। सांत दशमलव के लिए केवल (2) और (5) चाहिए।

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कौन-सी संख्या \(\sqrt{10}\) से बड़ी और \(\sqrt{17}\) से छोटी है?

Which number is greater than \(\sqrt{10}\) and less than \(\sqrt{17}\)?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

\(\sqrt{10}\) lies between (3) and (4), while \(\sqrt{17}\) lies between (4) and (5). Therefore (4) lies between them.

Step 2

Why this answer is correct

The correct answer is B. (4). \(\sqrt{10}\) lies between (3) and (4), while \(\sqrt{17}\) lies between (4) and (5). Therefore (4) lies between them.

Step 3

Exam Tip

\(\sqrt{10}\) (3) और (4) के बीच है, जबकि \(\sqrt{17}\) (4) और (5) के बीच है। इसलिए (4) बीच में है।

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यदि \(\sqrt{a}=9\), तो (a) का मान क्या है?

If \(\sqrt{a}=9\), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

B. (81)

Step 1

Concept

Squaring both sides gives (a=81). Squaring is useful in square root equations.

Step 2

Why this answer is correct

The correct answer is B. (81). Squaring both sides gives (a=81). Squaring is useful in square root equations.

Step 3

Exam Tip

दोनों ओर वर्ग करने पर (a=81) मिलता है। वर्गमूल समीकरण में वर्ग करना उपयोगी है।

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\(\sqrt{75}\div\sqrt{3}\) का मान क्या है?

What is the value of \(\sqrt{75}\div\sqrt{3}\)?

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Correct Answer

C. दोनों (A) और (B)Both (A) and (B)

Step 1

Concept

\(\sqrt{75}\div\sqrt{3}=\sqrt{25}=5\). Both forms are equal, so read options carefully.

Step 2

Why this answer is correct

The correct answer is C. दोनों (A) और (B) / Both (A) and (B). \(\sqrt{75}\div\sqrt{3}=\sqrt{25}=5\). Both forms are equal, so read options carefully.

Step 3

Exam Tip

\(\sqrt{75}\div\sqrt{3}=\sqrt{25}=5\)। दोनों रूप समान हैं, इसलिए सावधानी से विकल्प पढ़ें।

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कौन-सा विकल्प \(0.\overline{6}\) का भिन्न रूप है?

Which option is the fractional form of \(0.\overline{6}\)?

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Correct Answer

B. \(\frac{2}{3}\)

Step 1

Concept

\(0.\overline{6}=\frac{6}{9}=\frac{2}{3}\). Write the repeating digit over (9).

Step 2

Why this answer is correct

The correct answer is B. \(\frac{2}{3}\). \(0.\overline{6}=\frac{6}{9}=\frac{2}{3}\). Write the repeating digit over (9).

Step 3

Exam Tip

\(0.\overline{6}=\frac{6}{9}=\frac{2}{3}\)। आवर्ती अंक को (9) के हर में लिखें।

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\(\sqrt{200}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{200}\)?

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Correct Answer

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

Step 1

Concept

\(200=100\times2\), so \(\sqrt{200}=10\sqrt{2}\). Take out the largest perfect square.

Step 2

Why this answer is correct

The correct answer is A. \(10\sqrt{2}\). \(200=100\times2\), so \(\sqrt{200}=10\sqrt{2}\). Take out the largest perfect square.

Step 3

Exam Tip

\(200=100\times2\), इसलिए \(\sqrt{200}=10\sqrt{2}\)। सबसे बड़ा पूर्ण वर्ग निकालें।

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

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

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

The sum of rational (2) and irrational \(\sqrt{3}\) is irrational. In such questions, identify the type of each number.

Step 2

Why this answer is correct

The correct answer is B. अपरिमेय / Irrational. The sum of rational (2) and irrational \(\sqrt{3}\) is irrational. In such questions, identify the type of each number.

Step 3

Exam Tip

परिमेय (2) और अपरिमेय \(\sqrt{3}\) का योग अपरिमेय होता है। ऐसे प्रश्न में संख्या का प्रकार पहचानें।

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कौन-सा विकल्प \(\frac{13}{2^2\times5\times7}\) के दशमलव प्रसार के बारे में सही है?

Which option is correct about the decimal expansion of \(\frac{13}{2^2\times5\times7}\)?

Explanation opens after your attempt
Correct Answer

B. असांत आवर्तीNon-terminating recurring

Step 1

Concept

The denominator contains (7), so the decimal will not terminate. Since it is rational, it will be non-terminating recurring.

Step 2

Why this answer is correct

The correct answer is B. असांत आवर्ती / Non-terminating recurring. The denominator contains (7), so the decimal will not terminate. Since it is rational, it will be non-terminating recurring.

Step 3

Exam Tip

हर में (7) है, इसलिए दशमलव सांत नहीं होगा। परिमेय संख्या होने से यह असांत आवर्ती होगा।

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\(\sqrt{a^2}\) का मान (a) कब होगा?

When will \(\sqrt{a^2}\) be equal to (a)?

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Correct Answer

B. जब \(a\ge0\)When \(a\ge0\)

Step 1

Concept

\(\sqrt{a^2}=|a|\). It equals (a) only when \(a\ge0\).

Step 2

Why this answer is correct

The correct answer is B. जब \(a\ge0\) / When \(a\ge0\). \(\sqrt{a^2}=|a|\). It equals (a) only when \(a\ge0\).

Step 3

Exam Tip

\(\sqrt{a^2}=|a|\) होता है। यह (a) के बराबर तभी है जब \(a\ge0\)।

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कौन-सा विकल्प (1.272727...) का सही प्रकार बताता है?

Which option correctly describes (1.272727...)?

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Correct Answer

A. परिमेय संख्याRational number

Step 1

Concept

The block (27) repeats in the decimal, so it is recurring. Every recurring decimal is rational.

Step 2

Why this answer is correct

The correct answer is A. परिमेय संख्या / Rational number. The block (27) repeats in the decimal, so it is recurring. Every recurring decimal is rational.

Step 3

Exam Tip

दशमलव में (27) बार-बार दोहर रहा है, इसलिए यह आवर्ती दशमलव है। हर आवर्ती दशमलव परिमेय होता है।

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\(\sqrt{27}+\sqrt{12}-\sqrt{3}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{27}+\sqrt{12}-\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{3}\)

Step 1

Concept

\(\sqrt{27}=3\sqrt{3}\) and \(\sqrt{12}=2\sqrt{3}\). So \(3\sqrt{3}+2\sqrt{3}-\sqrt{3}=4\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(4\sqrt{3}\). \(\sqrt{27}=3\sqrt{3}\) and \(\sqrt{12}=2\sqrt{3}\). So \(3\sqrt{3}+2\sqrt{3}-\sqrt{3}=4\sqrt{3}\).

Step 3

Exam Tip

\(\sqrt{27}=3\sqrt{3}\) और \(\sqrt{12}=2\sqrt{3}\)। इसलिए \(3\sqrt{3}+2\sqrt{3}-\sqrt{3}=4\sqrt{3}\)।

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यदि \(\sqrt{x}\) अपरिमेय है और (5) परिमेय है, तो \(5\sqrt{x}\) सामान्यतः किस प्रकार की संख्या होगी, जब \(5\ne0\)?

If \(\sqrt{x}\) is irrational and (5) is rational, what type of number will \(5\sqrt{x}\) generally be when \(5\ne0\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

The product of a non-zero rational number and an irrational number remains irrational. This property is often tested in options.

Step 2

Why this answer is correct

The correct answer is B. अपरिमेय / Irrational. The product of a non-zero rational number and an irrational number remains irrational. This property is often tested in options.

Step 3

Exam Tip

शून्येतर परिमेय संख्या से अपरिमेय संख्या का गुणनफल अपरिमेय रहता है। यह गुण अक्सर विकल्पों में पूछा जाता है।

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\(\sqrt{2}\) को संख्या रेखा पर बनाने में कौन-सा निर्माण सही है?

Which construction is correct for representing \(\sqrt{2}\) on the number line?

Explanation opens after your attempt
Correct Answer

A. (1) और (1) भुजाओं वाला समकोण त्रिभुज बनाकर कर्ण लेनाMake a right triangle with sides (1) and (1), then take the hypotenuse

Step 1

Concept

\(1^2+1^2=2\), so the hypotenuse is \(\sqrt{2}\). Transfer that hypotenuse length to the number line.

Step 2

Why this answer is correct

The correct answer is A. (1) और (1) भुजाओं वाला समकोण त्रिभुज बनाकर कर्ण लेना / Make a right triangle with sides (1) and (1), then take the hypotenuse. \(1^2+1^2=2\), so the hypotenuse is \(\sqrt{2}\). Transfer that hypotenuse length to the number line.

Step 3

Exam Tip

\(1^2+1^2=2\), इसलिए कर्ण \(\sqrt{2}\) होगा। संख्या रेखा पर वही कर्ण लंबाई स्थानांतरित करें।

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कौन-सा विकल्प \(\sqrt{64}\) और \(\sqrt{65}\) के बारे में सही है?

Which option is correct about \(\sqrt{64}\) and \(\sqrt{65}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{64}=8\) और \(\sqrt{65}\) (8) और (9) के बीच है\(\sqrt{64}=8\) and \(\sqrt{65}\) lies between (8) and (9)

Step 1

Concept

\(64=8^2\) and \(8^2<65<9^2\). Therefore the first statement is correct.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{64}=8\) और \(\sqrt{65}\) (8) और (9) के बीच है / \(\sqrt{64}=8\) and \(\sqrt{65}\) lies between (8) and (9). \(64=8^2\) and \(8^2<65<9^2\). Therefore the first statement is correct.

Step 3

Exam Tip

\(64=8^2\) और \(8^2<65<9^2\) है। इसलिए पहला कथन सही है।

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\(\frac{2}{7}\) और (0.285714285714...) के संबंध में कौन-सा कथन सही है?

Which statement is correct about \(\frac{2}{7}\) and (0.285714285714...)?

Explanation opens after your attempt
Correct Answer

C. दशमलव आवर्ती है और \(\frac{2}{7}\) के बराबर हैThe decimal is recurring and equal to \(\frac{2}{7}\)

Step 1

Concept

The block (0.285714) repeats and it is the decimal form of \(\frac{2}{7}\). A recurring decimal is rational.

Step 2

Why this answer is correct

The correct answer is C. दशमलव आवर्ती है और \(\frac{2}{7}\) के बराबर है / The decimal is recurring and equal to \(\frac{2}{7}\). The block (0.285714) repeats and it is the decimal form of \(\frac{2}{7}\). A recurring decimal is rational.

Step 3

Exam Tip

(0.285714) का ब्लॉक दोहरता है और यह \(\frac{2}{7}\) का दशमलव रूप है। आवर्ती दशमलव परिमेय होता है।

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\(\sqrt{32}+\sqrt{18}\) का सरलतम रूप क्या है?

What is the simplest form of \(\sqrt{32}+\sqrt{18}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{32}=4\sqrt{2}\) and \(\sqrt{18}=3\sqrt{2}\). The sum is \(7\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is B. \(7\sqrt{2}\). \(\sqrt{32}=4\sqrt{2}\) and \(\sqrt{18}=3\sqrt{2}\). The sum is \(7\sqrt{2}\).

Step 3

Exam Tip

\(\sqrt{32}=4\sqrt{2}\) और \(\sqrt{18}=3\sqrt{2}\)। योग \(7\sqrt{2}\) है।

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कौन-सी संख्या (3) और (4) के बीच स्थित है?

Which number lies between (3) and (4)?

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Correct Answer

B. \(\sqrt{10}\)

Step 1

Concept

\(3^2<10<4^2\), so \(\sqrt{10}\) lies between (3) and (4). Comparing squares is the fastest method.

Step 2

Why this answer is correct

The correct answer is B. \(\sqrt{10}\). \(3^2<10<4^2\), so \(\sqrt{10}\) lies between (3) and (4). Comparing squares is the fastest method.

Step 3

Exam Tip

\(3^2<10<4^2\), इसलिए \(\sqrt{10}\) (3) और (4) के बीच है। वर्गों की तुलना सबसे तेज तरीका है।

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\(\sqrt{a}+\sqrt{b}=\sqrt{a+b}\) कब सामान्य रूप से सही नहीं माना जा सकता?

When can \(\sqrt{a}+\sqrt{b}=\sqrt{a+b}\) generally not be considered true?

Explanation opens after your attempt
Correct Answer

B. यह सामान्य रूप से सही नियम नहीं हैIt is not a generally true rule

Step 1

Concept

Numbers inside roots are not added directly when adding square roots. For example, \(\sqrt{4}+\sqrt{9}\ne\sqrt{13}\).

Step 2

Why this answer is correct

The correct answer is B. यह सामान्य रूप से सही नियम नहीं है / It is not a generally true rule. Numbers inside roots are not added directly when adding square roots. For example, \(\sqrt{4}+\sqrt{9}\ne\sqrt{13}\).

Step 3

Exam Tip

वर्गमूलों को जोड़ने में अंदर की संख्याएँ सीधे नहीं जोड़ी जातीं। जैसे \(\sqrt{4}+\sqrt{9}\ne\sqrt{13}\)।

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यदि \(\frac{m}{n}\) एक परिमेय संख्या है और \(n\ne0\), तो (m) और (n) किस प्रकार की संख्याएँ होती हैं?

If \(\frac{m}{n}\) is a rational number and \(n\ne0\), what type of numbers are (m) and (n)?

Explanation opens after your attempt
Correct Answer

B. पूर्णांकIntegers

Step 1

Concept

A rational number is in the form \(\frac{m}{n}\), where (m) and (n) are integers. The denominator must not be zero.

Step 2

Why this answer is correct

The correct answer is B. पूर्णांक / Integers. A rational number is in the form \(\frac{m}{n}\), where (m) and (n) are integers. The denominator must not be zero.

Step 3

Exam Tip

परिमेय संख्या \(\frac{m}{n}\) रूप में होती है जहाँ (m) और (n) पूर्णांक होते हैं। हर शून्य नहीं होना चाहिए।

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\(\sqrt{11}\) और \(\sqrt{15}\) के बीच कौन-सी पूर्ण संख्या आती है?

Which whole number lies between \(\sqrt{11}\) and \(\sqrt{15}\)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

\(\sqrt{11}\) and \(\sqrt{15}\) both lie between (3) and (4). No whole number lies strictly between them.

Step 2

Why this answer is correct

The correct answer is B. (3). \(\sqrt{11}\) and \(\sqrt{15}\) both lie between (3) and (4). No whole number lies strictly between them.

Step 3

Exam Tip

\(\sqrt{11}\) (3) और (4) के बीच है और \(\sqrt{15}\) भी (3) और (4) के बीच है। केवल (3) छोटा है, बीच में कोई पूर्ण संख्या नहीं आती।

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\(\sqrt{11}\) और \(\sqrt{15}\) के बीच पूर्ण संख्या के बारे में सही कथन कौन-सा है?

Which statement about whole numbers between \(\sqrt{11}\) and \(\sqrt{15}\) is correct?

Explanation opens after your attempt
Correct Answer

C. कोई पूर्ण संख्या नहीं हैThere is no whole number

Step 1

Concept

\(\sqrt{11}\approx3.3\) and \(\sqrt{15}\approx3.9\), so there is no whole number between them. Use nearest squares while estimating.

Step 2

Why this answer is correct

The correct answer is C. कोई पूर्ण संख्या नहीं है / There is no whole number. \(\sqrt{11}\approx3.3\) and \(\sqrt{15}\approx3.9\), so there is no whole number between them. Use nearest squares while estimating.

Step 3

Exam Tip

\(\sqrt{11}\approx3.3\) और \(\sqrt{15}\approx3.9\), इसलिए इनके बीच कोई पूर्ण संख्या नहीं है। अनुमान लगाते समय निकटतम वर्ग देखें।

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\(\frac{1}{\sqrt{7}+\sqrt{5}}\) का हर परिमेय करने पर क्या मिलेगा?

What is obtained after rationalising the denominator of \(\frac{1}{\sqrt{7}+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{\sqrt{7}-\sqrt{5}}{2}\)

Step 1

Concept

To rationalise the denominator, multiply by the conjugate \(\sqrt{7}-\sqrt{5}\). The denominator becomes (7-5=2).

Step 2

Why this answer is correct

The correct answer is B. \(\frac{\sqrt{7}-\sqrt{5}}{2}\). To rationalise the denominator, multiply by the conjugate \(\sqrt{7}-\sqrt{5}\). The denominator becomes (7-5=2).

Step 3

Exam Tip

हर को परिमेय करने के लिए संयुग्मी \(\sqrt{7}-\sqrt{5}\) से गुणा करें। हर (7-5=2) बनता है।

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\(\frac{43}{2^3\times5^5}\) का दशमलव प्रसार कितने दशमलव स्थानों तक सांत होगा?

The decimal expansion of \(\frac{43}{2^3\times5^5}\) will terminate after how many decimal places?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

The denominator has \(2^3\) and \(5^5\), so the larger power is (5). The decimal terminates after (5) places.

Step 2

Why this answer is correct

The correct answer is C. (5). The denominator has \(2^3\) and \(5^5\), so the larger power is (5). The decimal terminates after (5) places.

Step 3

Exam Tip

हर में \(2^3\) और \(5^5\) हैं, इसलिए अधिक घात (5) है। दशमलव (5) स्थानों तक सांत होगा।

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कौन-सा कथन \(\sqrt{80}\) और (9) की तुलना के बारे में सही है?

Which statement is correct about comparing \(\sqrt{80}\) and (9)?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{80}<9\)

Step 1

Concept

Because \(80<81=9^2\), so \(\sqrt{80}<9\). In square root comparison, check the nearest perfect square.

Step 2

Why this answer is correct

The correct answer is C. \(\sqrt{80}<9\). Because \(80<81=9^2\), so \(\sqrt{80}<9\). In square root comparison, check the nearest perfect square.

Step 3

Exam Tip

क्योंकि \(80<81=9^2\), इसलिए \(\sqrt{80}<9\)। वर्गमूल तुलना में निकटतम पूर्ण वर्ग देखें।

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\(\sqrt{0.0009}\) का मान क्या है?

What is the value of \(\sqrt{0.0009}\)?

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Correct Answer

B. (0.03)

Step 1

Concept

((0.03)2=0.0009), so \(\sqrt{0.0009}=0.03\). Count decimal places carefully.

Step 2

Why this answer is correct

The correct answer is B. (0.03). ((0.03)2=0.0009), so \(\sqrt{0.0009}=0.03\). Count decimal places carefully.

Step 3

Exam Tip

((0.03)2=0.0009), इसलिए \(\sqrt{0.0009}=0.03\)। दशमलव स्थानों को ध्यान से गिनें।

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\(\sqrt{18}\) और \(\sqrt{19}\) के बीच पूर्ण संख्या के बारे में सही कथन कौन-सा है?

Which statement about whole numbers between \(\sqrt{18}\) and \(\sqrt{19}\) is correct?

Explanation opens after your attempt
Correct Answer

C. कोई पूर्ण संख्या नहीं हैThere is no whole number

Step 1

Concept

Both square roots lie between (4) and (5), but \(\sqrt{18}>4\) and \(\sqrt{19}<5\). Therefore there is no whole number between them.

Step 2

Why this answer is correct

The correct answer is C. कोई पूर्ण संख्या नहीं है / There is no whole number. Both square roots lie between (4) and (5), but \(\sqrt{18}>4\) and \(\sqrt{19}<5\). Therefore there is no whole number between them.

Step 3

Exam Tip

दोनों वर्गमूल (4) और (5) के बीच हैं, पर \(\sqrt{18}>4\) और \(\sqrt{19}<5\) है। इसलिए इनके बीच कोई पूर्ण संख्या नहीं है।

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\(\sqrt{121}+\sqrt{2}\) किस प्रकार की संख्या है?

What type of number is \(\sqrt{121}+\sqrt{2}\)?

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Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(\sqrt{121}=11\) is rational and \(\sqrt{2}\) is irrational. The sum of a rational and an irrational number is irrational.

Step 2

Why this answer is correct

The correct answer is B. अपरिमेय / Irrational. \(\sqrt{121}=11\) is rational and \(\sqrt{2}\) is irrational. The sum of a rational and an irrational number is irrational.

Step 3

Exam Tip

\(\sqrt{121}=11\) परिमेय है और \(\sqrt{2}\) अपरिमेय है। परिमेय और अपरिमेय का योग अपरिमेय होता है।

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यदि (x=0.01001000100001...) है, तो (x) किस प्रकार की संख्या है?

If (x=0.01001000100001...), what type of number is (x)?

Explanation opens after your attempt
Correct Answer

C. अपरिमेय क्योंकि यह असांत अनावर्ती हैIrrational because it is non-terminating non-recurring

Step 1

Concept

The decimal continues forever and has no fixed repetition. Therefore it is an irrational number.

Step 2

Why this answer is correct

The correct answer is C. अपरिमेय क्योंकि यह असांत अनावर्ती है / Irrational because it is non-terminating non-recurring. The decimal continues forever and has no fixed repetition. Therefore it is an irrational number.

Step 3

Exam Tip

दशमलव अनंत तक चलता है और कोई निश्चित आवृत्ति नहीं है। इसलिए यह अपरिमेय संख्या है।

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