Perfect numbers are defined as those whose total factors add up to double the number itself.

Which of the following numbers qualifies as a perfect number?

I) 6
II) 28
III) 30

Answer Choices

Correct answer marked below

I only

II only

III only

I and II only

Correct

I, II and III all

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Explanation

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Official Explanation

Official

Perfect numbers are defined as numbers whose total factors sum to twice the number itself. For the numbers given: I) 6 has factors 1, 2, 3, and 6, which sum to 12 (twice 6). II) 28 has…

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Comments

JohnApr 5, 2025

Can you explain more?

bharadwajJan 4, 2025

thankss

ArjunApr 21, 2024

thankss

What this question tests

What it tests

Your understanding of divisibility rules, least common multiples, and greatest common factors.

Common trap

Forgetting that 1 is not prime and that every integer divides 0.

Perfect numbers are defined as those whose total factors add up to double the number itself.Which of the following numbers qualifies as a perfect number? I) 6 II) 28 III) 30