Free Practice Question

PS · Problem Solving

sub-505

Divisibility/Multiples/Factors

Given that $80x = 2^4 * 5^2 * 7$ , which of the following is not a factor of the integer x?

Answer Choices

Correct answer marked below

A

1

B

5

C

7

14

Correct

E

35

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Explanation

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Official Explanation

Official

The equation can be rewritten as

80x = (2^4) * (5^2) * (7)

. We can factor 80 as

80 = 16 * 5 = (2^4) * (5)

. Thus, we have [m]x…

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D

DikshaOct 29, 2024

thank you taking time to upload it!

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.

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Given that 80x=24∗52∗780x = 2^4 * 5^2 * 780x=24∗52∗7, which of the following is not a factor of the integer x?