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sqrt5 proof MCQ Questions for Class 10

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93 questions tagged with sqrt5 proof.

Question 91/93 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

समीकरण \(p^2=5q^2\) से कौन सा निष्कर्ष निकलता है?

What conclusion follows from the equation \(p^2=5q^2\)?

Explanation opens after your attempt
Correct Answer

A. \(p^2\) (5) से विभाज्य है\(p^2\) is divisible by (5)

Step 1

Concept

In \(p^2=5q^2\), the right side has factor (5).

Step 2

Why this answer is correct

Therefore \(p^2\) is divisible by (5).

Step 3

Exam Tip

This gives the next conclusion about (p) in the proof. चरण 1: \(p^2=5q^2\) में दाईं ओर (5) गुणनखंड है। चरण 2: इसलिए \(p^2\) (5) से विभाज्य है। चरण 3: प्रमाण में इसी से (p) के बारे में अगला निष्कर्ष लिया जाता है।

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Question 92/93 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

यदि \(\sqrt{5}=\frac{p}{q}\), तो वर्ग करने पर क्या प्राप्त होगा?

If \(\sqrt{5}=\frac{p}{q}\), what is obtained after squaring?

Explanation opens after your attempt
Correct Answer

A. \(p^2=5q^2\)

Step 1

Concept

Squaring both sides gives \(5=\frac{p^2}{q^2}\).

Step 2

Why this answer is correct

Multiplying by \(q^2\) gives \(p^2=5q^2\).

Step 3

Exam Tip

Write the denominator-clearing step clearly. चरण 1: दोनों ओर वर्ग करें तो \(5=\frac{p^2}{q^2}\) मिलता है। चरण 2: \(q^2\) से गुणा करने पर \(p^2=5q^2\) मिलता है। चरण 3: हर को हटाने का चरण साफ लिखें।

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Question 93/93 Easy Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 16

\(\sqrt{5}\) को अपरिमेय सिद्ध करने की शुरुआत में क्या माना जाता है?

What is assumed at the beginning to prove that \(\sqrt{5}\) is irrational?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{5}\) परिमेय है और \(\sqrt{5}=\frac{p}{q}\), जहां (p) और (q) सहअभाज्य हैं\(\sqrt{5}\) is rational and \(\sqrt{5}=\frac{p}{q}\), where (p) and (q) are coprime

Step 1

Concept

In the contradiction method, we assume the opposite.

Step 2

Why this answer is correct

So \(\sqrt{5}\) is assumed rational and written as \(\frac{p}{q}\).

Step 3

Exam Tip

Do not forget to mention that (p) and (q) are coprime. चरण 1: विरोधाभास विधि में उलटी बात मानते हैं। चरण 2: इसलिए \(\sqrt{5}\) को परिमेय मानकर \(\frac{p}{q}\) के रूप में लिखा जाता है। चरण 3: (p) और (q) को सहअभाज्य लिखना न भूलें।

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