Concept-wise Practice

sqrt5 MCQ Questions for Class 10

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Practice Questions

13 questions tagged with sqrt5.

Question 1/13 Medium Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

एक प्रमाण में \(p^2=5q^2\), फिर (p=5k), फिर \(q^2=5k^2\) मिला। यह किस संख्या की अपरिमेयता से जुड़ा है?

In a proof, \(p^2=5q^2\), then (p=5k), then \(q^2=5k^2\) are obtained. This is related to the irrationality of which number?

Explanation opens after your attempt
Correct Answer

C. \(\sqrt{5}\)

Step 1

Concept

The main factor in the equation is (5).

Step 2

Why this answer is correct

\(p^2=5q^2\) usually comes from the proof of \(\sqrt{5}\).

Step 3

Exam Tip

To identify the proof, look at the factor in the equation. चरण 1: समीकरण में मुख्य गुणनखंड (5) है। चरण 2: \(p^2=5q^2\) सामान्य रूप से \(\sqrt{5}\) के प्रमाण से आता है। चरण 3: प्रमाण पहचानने के लिए समीकरण में गुणनखंड देखें।

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Question 2/13 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

यदि (p) और (q) दोनों (5) से विभाज्य हैं, तो उनके सहअभाज्य होने पर क्या असर पड़ेगा?

If both (p) and (q) are divisible by (5), what happens to their being coprime?

Explanation opens after your attempt
Correct Answer

A. वे सहअभाज्य नहीं रहेंगेThey will not remain coprime

Step 1

Concept

If both are divisible by (5), then (5) is a common factor.

Step 2

Why this answer is correct

Coprime numbers should not have a common factor other than (1).

Step 3

Exam Tip

So this situation goes against being coprime. चरण 1: दोनों (5) से विभाज्य हैं तो (5) साझा गुणनखंड है। चरण 2: सहअभाज्य संख्याओं में (1) के अलावा साझा गुणनखंड नहीं होना चाहिए। चरण 3: इसलिए यह स्थिति सहअभाज्य होने के विरुद्ध है।

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Question 3/13 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

यदि \(p^2\) (5) से विभाज्य है, तो (p) के बारे में कौन सा निष्कर्ष लिया जाता है?

If \(p^2\) is divisible by (5), what conclusion is taken about (p)?

Explanation opens after your attempt
Correct Answer

C. (p) (5) से विभाज्य है(p) is divisible by (5)

Step 1

Concept

(5) is a prime number.

Step 2

Why this answer is correct

If the square of an integer is divisible by (5), then the integer is also divisible by (5).

Step 3

Exam Tip

This rule is used in the proof of \(\sqrt{5}\). चरण 1: (5) अभाज्य संख्या है। चरण 2: यदि किसी पूर्णांक का वर्ग (5) से विभाज्य है, तो वह पूर्णांक भी (5) से विभाज्य होगा। चरण 3: यह नियम \(\sqrt{5}\) के प्रमाण में उपयोग होता है।

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Question 4/13 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

यदि \(p^2\) (5) से विभाज्य है, तो (p) के बारे में क्या सही है?

If \(p^2\) is divisible by (5), what is true about (p)?

Explanation opens after your attempt
Correct Answer

A. (p) भी (5) से विभाज्य है(p) is also divisible by (5)

Step 1

Concept

(5) is a prime number.

Step 2

Why this answer is correct

If the square of an integer is divisible by (5), then the integer is also divisible by (5).

Step 3

Exam Tip

This rule moves the proof forward. चरण 1: (5) अभाज्य संख्या है। चरण 2: किसी पूर्णांक का वर्ग (5) से विभाज्य हो तो पूर्णांक भी (5) से विभाज्य होता है। चरण 3: इसी नियम से प्रमाण आगे बढ़ता है।

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Question 5/13 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{5}+\sqrt{45}\), तो (x) का सरल रूप क्या है?

If \(x=\sqrt{5}+\sqrt{45}\), what is the simplified form of (x)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{5}\)

Step 1

Concept

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

Step 2

Why this answer is correct

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

Step 3

Exam Tip

Simplify radicals before adding them. चरण 1: \(\sqrt{45}=3\sqrt{5}\)। चरण 2: \(x=\sqrt{5}+3\sqrt{5}=4\sqrt{5}\)। चरण 3: जोड़ने से पहले वर्गमूलों को सरल रूप में बदलें।

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Question 6/13 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(\sqrt{5}=2.236\) लगभग है, तो \(5\sqrt{5}\) का लगभग मान क्या होगा?

If \(\sqrt{5}=2.236\) approximately, what is the approximate value of \(5\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. (11.180)

Step 1

Concept

Multiply the given approximate value by (5).

Step 2

Why this answer is correct

\(5\sqrt{5}\approx5\times2.236=11.180\).

Step 3

Exam Tip

In approximation questions, directly use the given value. चरण 1: दिए गए लगभग मान को (5) से गुणा करें। चरण 2: \(5\sqrt{5}\approx5\times2.236=11.180\)। चरण 3: अनुमान वाले प्रश्न में दिए गए मान का सीधा उपयोग करें।

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Question 7/13 Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(x=3+\sqrt{5}\), तो (x-3) किस प्रकार की संख्या है?

If \(x=3+\sqrt{5}\), what type of number is (x-3)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

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

Step 2

Why this answer is correct

This leaves \(\sqrt{5}\), which is irrational.

Step 3

Exam Tip

Simplify the expression before deciding the nature of the number. चरण 1: (x-3=\(3+\sqrt{5}\)-3) होगा। चरण 2: इससे \(\sqrt{5}\) बचता है, जो अपरिमेय है। चरण 3: अभिव्यक्ति को सरल करके संख्या की प्रकृति तय करें।

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Question 8/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{80}-\sqrt{45}\) का सरल रूप क्या होगा?

What will be the simplified form of \(\sqrt{80}-\sqrt{45}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}\)

Step 1

Concept

\(\sqrt{80}=4\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\).

Step 2

Why this answer is correct

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

Step 3

Exam Tip

Before subtracting, simplify both radicals completely. चरण 1: \(\sqrt{80}=4\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\)। चरण 2: \(4\sqrt{5}-3\sqrt{5}=\sqrt{5}\)। चरण 3: घटाने से पहले दोनों वर्गमूलों को पूरी तरह सरल करें।

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Question 9/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{5}+\sqrt{45}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{5}+\sqrt{45}\)?

Explanation opens after your attempt
Correct Answer

A. \(4\sqrt{5}\)

Step 1

Concept

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

Step 2

Why this answer is correct

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

Step 3

Exam Tip

While adding radicals, simplify them until like radicals appear. चरण 1: \(\sqrt{45}=3\sqrt{5}\) है। चरण 2: \(\sqrt{5}+3\sqrt{5}=4\sqrt{5}\)। चरण 3: वर्गमूल जोड़ते समय समान वर्गमूल बनने तक सरल करें।

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Question 10/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

\(\sqrt{45}-\sqrt{20}\) का सरल रूप क्या है?

What is the simplified form of \(\sqrt{45}-\sqrt{20}\)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}\)

Step 1

Concept

\(\sqrt{45}=3\sqrt{5}\) and \(\sqrt{20}=2\sqrt{5}\).

Step 2

Why this answer is correct

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

Step 3

Exam Tip

Simplify both radicals before subtracting. चरण 1: \(\sqrt{45}=3\sqrt{5}\) और \(\sqrt{20}=2\sqrt{5}\)। चरण 2: \(3\sqrt{5}-2\sqrt{5}=\sqrt{5}\)। चरण 3: घटाने से पहले दोनों वर्गमूलों को सरल करें।

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Question 11/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

\(\frac{\sqrt{5}}{5}\) कैसी संख्या है?

What type of number is \(\frac{\sqrt{5}}{5}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(\sqrt{5}\) is irrational.

Step 2

Why this answer is correct

Dividing it by the non-zero rational number (5) keeps it irrational.

Step 3

Exam Tip

A rational denominator alone does not make the whole expression rational. चरण 1: \(\sqrt{5}\) अपरिमेय है। चरण 2: अशून्य परिमेय संख्या (5) से भाग देने पर यह अपरिमेय ही रहती है। चरण 3: हर में परिमेय संख्या होने से पूरा पद परिमेय नहीं हो जाता।

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Question 12/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सी संख्या \(\sqrt{5}\) के सबसे निकट है?

Which number is closest to \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. (2.24)

Step 1

Concept

The value of \(\sqrt{5}\) is about (2.236).

Step 2

Why this answer is correct

(2.24) is the closest value.

Step 3

Exam Tip

While choosing nearest values, do not depend only on integer boundaries. चरण 1: \(\sqrt{5}\) का मान लगभग (2.236) है। चरण 2: (2.24) इस मान के सबसे निकट है। चरण 3: निकटतम मान चुनते समय केवल पूर्णांक सीमा पर निर्भर न रहें।

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Question 13/13 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

\(2+\sqrt{5}\) के बारे में सही कथन कौन-सा है?

Which statement is correct about \(2+\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

B. यह अपरिमेय हैIt is irrational

Step 1

Concept

(2) is rational and \(\sqrt{5}\) is irrational.

Step 2

Why this answer is correct

The sum of a rational and an irrational number is irrational.

Step 3

Exam Tip

In such questions, identify the nature of both parts separately. चरण 1: (2) परिमेय है और \(\sqrt{5}\) अपरिमेय है। चरण 2: परिमेय और अपरिमेय का योग अपरिमेय होता है। चरण 3: ऐसे प्रश्नों में दोनों भागों की प्रकृति अलग-अलग पहचानें।

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