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GMAT DS

by Woozler » Mon Dec 13, 2010 9:08 am
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) 2 is not a factor of n
(2) 3 is not a factor of n
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Source: — Data Sufficiency |
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by clock60 » Mon Dec 13, 2010 11:10 am
follow this link
https://www.beatthegmat.com/remainder-wi ... 71089.html
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