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Mathematics Real Numbers MCQ Questions for Class 9

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Same chapter ke nearby topics ko revise jarur karein. Exam preparation ke liye yeh topics important hain. jisme niche ke ye 8 Topics hain.

8 topics
01 Practice Topic Rational numbers 51 MCQs 02 Practice Topic Exponents 600 MCQs 03 Practice Topic Number line 600 MCQs 04 Practice Topic Decimal representation 600 MCQs 05 Practice Topic Irrational numbers 600 MCQs 06 Practice Topic Proof of irrationality of square root 2 and square root 3 649 MCQs 07 Practice Topic Square root spiral 650 MCQs 08 Practice Topic General chapter practice 50 MCQs

Real Numbers Practice Questions

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Question 551/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

यदि \(x=\sqrt{12}+\sqrt{27}\) तो (x) का सरल रूप क्या है?

If \(x=\sqrt{12}+\sqrt{27}\), what is the simplified form of (x)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{27}=3\sqrt{3}\)। समान मूलों को जोड़ें। / \(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\). Add like surds.

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Question 552/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

यदि \(a=\sqrt{18}-\sqrt{8}\) तो (a) क्या है?

If \(a=\sqrt{18}-\sqrt{8}\), what is (a)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\)

Explanation

Simple Explanation

\(3\sqrt{2}-2\sqrt{2}=\sqrt{2}\)। पहले सरल करें। / \(3\sqrt{2}-2\sqrt{2}=\sqrt{2}\). Simplify first.

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Question 553/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

किस भिन्न का दशमलव प्रसार असमाप्य आवर्ती है?

Which fraction has a non-terminating recurring decimal?

Explanation opens after your attempt
Correct Answer

B. \(\frac{7}{12}\)

Explanation

Simple Explanation

हर में 3 का गुणनखंड है। दशमलव आवर्ती होगा। / The denominator contains factor 3. The decimal will recur.

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Question 554/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

\(\sqrt{48}+\sqrt{75}\) का मान क्या है?

What is the value of \(\sqrt{48}+\sqrt{75}\)?

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Correct Answer

C. \(13\sqrt{3}\)

Explanation

Simple Explanation

\(4\sqrt{3}+5\sqrt{3}=9\sqrt{3}\) नहीं। सही: \(\sqrt{48}=4\sqrt{3}\), \(\sqrt{75}=5\sqrt{3}\), योग \(9\sqrt{3}\)। / Simplify each surd before adding. Always verify calculations.

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Question 555/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

यदि \(x=\sqrt{2}\times\sqrt{50}\) तो (x) क्या है?

If \(x=\sqrt{2}\times\sqrt{50}\), what is (x)?

Explanation opens after your attempt
Correct Answer

B. 10

Explanation

Simple Explanation

\(\sqrt{100}=10\)। गुणन नियम लगाएँ। / \(\sqrt{100}=10\). Apply the multiplication rule.

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Question 556/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

यदि \(a=\sqrt{5}\) और \(b=\sqrt{20}\) तो (a+b) क्या है?

If \(a=\sqrt{5}\) and \(b=\sqrt{20}\), what is (a+b)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\sqrt{20}=2\sqrt{5}\)। योग \(3\sqrt{5}\) होगा। / \(\sqrt{20}=2\sqrt{5}\). Then add like surds.

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Question 557/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

\(\sqrt{7}\times\sqrt{63}\) का मान क्या है?

What is the value of \(\sqrt{7}\times\sqrt{63}\)?

Explanation opens after your attempt
Correct Answer

C. 21

Explanation

Simple Explanation

\(\sqrt{441}=21\)। पहले अंदर गुणा करें। / \(\sqrt{441}=21\). Multiply inside the root first.

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Question 558/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

यदि \(x=\sqrt{81}-\sqrt{49}\) तो (x) क्या है?

If \(x=\sqrt{81}-\sqrt{49}\), what is (x)?

Explanation opens after your attempt
Correct Answer

B. 2

Explanation

Simple Explanation

(9-7=2)। मूलों का सही मान लें। / (9-7=2). Evaluate roots correctly.

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Question 559/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

\(\sqrt{98}-\sqrt{32}\) का मान क्या है?

What is the value of \(\sqrt{98}-\sqrt{32}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\)

Explanation

Simple Explanation

\(7\sqrt{2}-4\sqrt{2}=3\sqrt{2}\)। पहले सरल करें। / \(7\sqrt{2}-4\sqrt{2}=3\sqrt{2}\). Simplify first.

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Question 560/600 Expert Mathematics Number Systems Real Numbers Class 9 Level 3

कौन-सी संख्या \(\sqrt{50}\) के सबसे निकट है?

Which number is closest to \(\sqrt{50}\)?

Explanation opens after your attempt
Correct Answer

B. 7

Explanation

Simple Explanation

\(\sqrt{50}\approx7.07\)। अनुमान का प्रयोग करें। / \(\sqrt{50}\approx7.07\). Use estimation.

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