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snapplesf
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PostPosted: Fri Mar 23, 2007 12:01 pm    Post subject: Find the remainder Reply with quote
source - GMATPrep
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If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r ?

1) n is not divisible by 2

2) n is not divisible by 4








see answer below -




Ans = C.

I have no idea how to do this - any help ?
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jayhawk2001
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PostPosted: Fri Mar 23, 2007 7:25 pm    Post subject: Reply with quote
Please check http://www.beatthegmat.com/viewtopic.php?t=1638
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