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# Gmatprep GCF

Author Message
Intern
Joined: 19 Jan 2009
Posts: 18
Schools: Kellogg, Ross, Darden, Kelley, UNC

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18 May 2009, 11:59
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:11) correct 0% (00:00) wrong based on 0 sessions

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Don't have a clue, can anyone help?

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Current Student
Joined: 13 May 2008
Posts: 141
Schools: LBS

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18 May 2009, 12:32
simple: (2^34)-(2^28) b/c 4^17 = 2^34

now, (2^28)(2^6)-(2^28)

which is 2^28(2^6-1)

forget 2^28(63) = 2^28 x (7x9) and you have your 7

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If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Re: Gmatprep GCF   [#permalink] 18 May 2009, 12:32
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