Concept-wise Practice

common method MCQ Questions for Class 10

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Practice Questions

2 questions tagged with common method.

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

कौन-सा कथन \(\sqrt{2}\), \(\sqrt{3}\), और \(\sqrt{5}\) के प्रमाणों में समान है?

Which statement is common to the proofs of \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. परिमेय मानने से सहअभाज्य अंश और हर में साझा गुणनखंड आ जाता हैAssuming rationality creates a common factor in the coprime numerator and denominator

Step 1

Concept

In all three proofs, the number is first assumed rational.

Step 2

Why this answer is correct

Then the related prime number is forced to divide both numerator and denominator.

Step 3

Exam Tip

Understanding this common structure makes all three proofs easier to remember. चरण 1: तीनों प्रमाणों में संख्या को पहले परिमेय माना जाता है। चरण 2: फिर संबंधित अभाज्य संख्या अंश और हर दोनों को भाग देने लगती है। चरण 3: समान ढाँचा समझने से तीनों प्रमाण आसानी से याद रहते हैं।

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

कौन सा विकल्प \(\sqrt{2}\), \(\sqrt{3}\), और \(\sqrt{5}\) तीनों के प्रमाणों में समान है?

Which option is common in the proofs of \(\sqrt{2}\), \(\sqrt{3}\), and \(\sqrt{5}\)?

Explanation opens after your attempt
Correct Answer

A. तीनों में पहले संख्या को परिमेय मानते हैंIn all three, the number is first assumed rational

Step 1

Concept

All three proofs are based on contradiction.

Step 2

Why this answer is correct

So the number is first assumed rational.

Step 3

Exam Tip

Then this assumption leads to an impossible common factor. चरण 1: तीनों प्रमाण विरोधाभास विधि पर आधारित हैं। चरण 2: इसलिए शुरुआत में संख्या को परिमेय मानते हैं। चरण 3: फिर इसी मान्यता से असंभव साझा गुणनखंड मिलता है।

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