Medium Mathematics Chapter 1: Real Numbers Class 10 Level 10

किस अभाज्य गुणनखंडन से विषम संख्या बनेगी?

Which prime factorisation will form an odd number?

Explanation opens after your attempt
Correct Answer

C. \(3^2 \times 5 \times 7\)

Step 1

Concept

An odd number does not have (2) as a prime factor.

Step 2

Why this answer is correct

The third option has (3,5,7) and no (2), so it forms an odd number.

Step 3

Exam Tip

If (2) appears, the number is even. चरण 1: विषम संख्या में (2) अभाज्य गुणनखंड नहीं होता। चरण 2: तीसरे विकल्प में (3,5,7) हैं और (2) नहीं है, इसलिए यह विषम संख्या बनेगी। चरण 3: (2) दिखते ही संख्या सम हो जाती है।

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What is the correct answer to this Mathematics MCQ?

The correct answer is C. \(3^2 \times 5 \times 7\).

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