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How many prime numbers between 1 and 100 are factors of 168?

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How many prime numbers between 1 and 100 are factors of 168?  [#permalink]

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New post 27 Jan 2019, 10:34
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

84% (00:32) correct 16% (00:44) wrong based on 29 sessions

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How many prime numbers between 1 and 100 are factors of 168?

A. One
B. Two
C. Three
D. Four
E. Five

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Re: How many prime numbers between 1 and 100 are factors of 168?  [#permalink]

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New post 27 Jan 2019, 18:41
1
Prime factorization of \(168 = 2^3*3*7\)
Factors of 168 which are prime are 2, 3, 7.

C is the answer.
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Re: How many prime numbers between 1 and 100 are factors of 168?   [#permalink] 27 Jan 2019, 18:41
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How many prime numbers between 1 and 100 are factors of 168?

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