A number that is divisible by both 20 and 30 must also be divisible by which of the following?

Correct answer marked below

A

40

60

Correct

C

100

D

300

E

600

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Explanation

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Official Explanation

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To determine the divisibility, we first find the prime factorization of the numbers. The prime factorization of 20 is

2^2*5

and for 30 it is

2*3*5

. The…

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Comments

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M

MANAGEMENTJan 27, 2024

got this wrong on my practice

V

VighneshAug 17, 2024

good question

What this question tests

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

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

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