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cube factors MCQ Questions for Class 10

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Practice Questions

1 questions tagged with cube factors.

Question 1/1 Expert Mathematics Chapter 1: Real Numbers 3: Prime factorisation Class 10 Level 7

यदि \(540=2^2\times3^3\times5\), तो (540) के ऐसे गुणनखंडों की संख्या कितनी है जो पूर्ण घन हैं?

If \(540=2^2\times3^3\times5\), how many factors of (540) are perfect cubes?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

A cube factor must have exponents that are multiples of (3).

Step 2

Why this answer is correct

For (2), only (0); for (3), (0) or (3); for (5), only (0). Total (=2).

Step 3

Exam Tip

Remember that (0) is also a multiple of (3). चरण 1: पूर्ण घन गुणनखंड में हर अभाज्य घात (3) की गुणज होनी चाहिए। चरण 2: (2) की घात केवल (0), (3) की घात (0) या (3), और (5) की घात केवल (0) हो सकती है। कुल \(1\times2\times1=2\)। चरण 3: घन गुणनखंडों में (0) भी (3) की गुणज माना जाता है।

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