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If n is a positive integer, is n - 3 a prime number? (1) n is not a p

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If n is a positive integer, is n - 3 a prime number? (1) n is not a p  [#permalink]

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New post 18 Sep 2019, 00:38
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E

Difficulty:

  65% (hard)

Question Stats:

70% (01:23) correct 30% (01:44) wrong based on 20 sessions

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If \(n\) is a positive integer, is \(n - 3\) a prime number?

(1) \(n\) is not a prime number.

(2) \(8 ≥ n ≥ 4\)

Source: McGraw-Hill's GMAT (1-24)

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Re: If n is a positive integer, is n - 3 a prime number? (1) n is not a p  [#permalink]

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New post 18 Sep 2019, 00:41
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Re: If n is a positive integer, is n - 3 a prime number? (1) n is not a p  [#permalink]

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New post 18 Sep 2019, 09:52
SajjadAhmad wrote:
If \(n\) is a positive integer, is \(n - 3\) a prime number?

(1) \(n\) is not a prime number.

(2) \(8 ≥ n ≥ 4\)

Source: McGraw-Hill's GMAT (1-24)


(1) if n = 9 (not a prime number)

9-3 = 6 not a prime number

Not Sufficient.

(2)
4-3 = 1 not a prime number
5-3 =2
6-3 = 3
7-3 = 4 not a prime number
8-3 = 5

Not Sufficient

(1)+(2)
4-3 = 1 n-3 not a prime number
6-3 = 3
8-3 = 5

Answer E
GMAT Club Bot
Re: If n is a positive integer, is n - 3 a prime number? (1) n is not a p   [#permalink] 18 Sep 2019, 09:52
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If n is a positive integer, is n - 3 a prime number? (1) n is not a p

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