Expert Mathematics Chapter 1: Real Numbers Class 10 Level 13

किस विकल्प में दिया गया दशमलव निश्चित रूप से अपरिमेय है?

Which given decimal is definitely irrational?

Explanation opens after your attempt
Correct Answer

C. \(0.120120012000120000\ldots\)

Step 1

Concept

First check whether a fixed block of digits repeats.

Step 2

Why this answer is correct

In \(0.120120012000120000\ldots\), the number of zeros keeps changing, so there is no fixed repetition.

Step 3

Exam Tip

A non-terminating non-recurring decimal is irrational. चरण 1: पहले देखें कि कोई निश्चित अंकों का समूह बार-बार आ रहा है या नहीं। चरण 2: \(0.120120012000120000\ldots\) में शून्यों की संख्या बदलती जाती है, इसलिए स्थिर आवर्तन नहीं है। चरण 3: असांत अनावर्ती दशमलव अपरिमेय होता है।

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What is the correct answer to this Mathematics MCQ?

The correct answer is C. \(0.120120012000120000\ldots\).

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