Concept-wise Practice

decimal MCQ Questions for Class 10

decimal se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

2 questions tagged with decimal.

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

कौन-सा विकल्प \(\sqrt{5}\) की अपरिमेयता के लिए केवल अधूरा संकेत है, पूर्ण प्रमाण नहीं?

Which option is only an incomplete hint for the irrationality of \(\sqrt{5}\), not a full proof?

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Correct Answer

A. \(\sqrt{5}\) का दशमलव समाप्त नहीं दिखताThe decimal of \(\sqrt{5}\) does not seem to terminate

Step 1

Concept

Looking at the decimal only gives an idea.

Step 2

Why this answer is correct

A complete proof assumes rationality and shows the common-factor contradiction.

Step 3

Exam Tip

In exams, write a proof, not a guess. चरण 1: दशमलव को देखकर केवल अनुमान बनता है। चरण 2: पूर्ण प्रमाण में परिमेय मानकर साझा गुणनखंड का विरोधाभास दिखाते हैं। चरण 3: परीक्षा में अनुमान नहीं, प्रमाण लिखें।

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Question 2/2 Easy Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प अपरिमेय संख्या की सही पहचान बताता है?

Which option gives the correct identification of an irrational number?

Explanation opens after your attempt
Correct Answer

C. जिसका दशमलव अनवसानी और अनावर्ती होIts decimal is non-terminating and non-recurring

Step 1

Concept

The decimal of an irrational number does not terminate.

Step 2

Why this answer is correct

It also does not repeat in a fixed pattern.

Step 3

Exam Tip

Decimal expansion is a useful way to identify irrational numbers. चरण 1: अपरिमेय संख्या का दशमलव खत्म नहीं होता। चरण 2: उसमें कोई निश्चित दोहराव भी नहीं होता। चरण 3: दशमलव विस्तार देखकर अपरिमेय संख्या पहचानना आसान हो जाता है।

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