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# Is the positive integer n an odd integer? 1) n+4 is a prime

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Intern
Joined: 02 Apr 2007
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Is the positive integer n an odd integer? 1) n+4 is a prime [#permalink]  19 Oct 2007, 20:28
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Is the positive integer n an odd integer?
1) n+4 is a prime number
2) n+3 is not a prime number
VP
Joined: 09 Jul 2007
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Location: London
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Re: DS number properties GMATPrep 2 [#permalink]  20 Oct 2007, 00:24
DTM wrote:
Is the positive integer n an odd integer?
1) n+4 is a prime number
2) n+3 is not a prime number

A.

1. N+4 is a prime number then N cannot be even and negative N=1, 3, 7, 9... so Yes, it is an odd suff.

2. N+3 is not a prime number. n can be even or odd. n=6 or n=3 not suff.
Intern
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OA is A.

thank you for explaining it Ravshonbek, i must've read it wrong because it makes complete sense to me now
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