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GMAT Prep ?? (Divisibility) Pract2

Expert replies
by dferm » Tue May 13, 2008 3:42 pm
If n is a positive integer and r is the remainder when n^2-1 is divided by 8, what is the value of r?

(1) n is odd
(2) n is not divisible by 8

Can someone please break this down for me...

Thank.s
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Source: — Data Sufficiency |

by prabhu3645 » Tue May 13, 2008 6:17 pm
is the answer A
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by dferm » Tue May 13, 2008 7:47 pm
YES
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