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# gmat prep

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Director
Joined: 23 May 2008
Posts: 799

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15 Sep 2008, 10:41
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Director
Joined: 12 Jul 2008
Posts: 514
Schools: Wharton

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15 Sep 2008, 10:51
bigtreezl wrote:
see attached

Is n divisible by 5 and 3?

(1) Insufficient
n is divisible by 5 and 4 but not necessarily 3.

(2) Insufficient

n+6 = 3k where k is any integer
(n+6)/3 = k
n/3 + 2 = k
n/3 = k - 2

Because k-2 is an integer, n must be divisible by 3 but not necessarily 5.

(1) and (2) Sufficient
Intern
Joined: 02 Sep 2008
Posts: 45

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15 Sep 2008, 11:31
Yeah,

I agree too.

It is C. Both together are sufficient.
Re: gmat prep   [#permalink] 15 Sep 2008, 11:31
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# gmat prep

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