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Woozler: Senior | Next Rank: 100 Posts; Posts: 43; Joined: Sat Nov 06, 2010 12:04 pm

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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clock60: Legendary Member; Posts: 759; Joined: Mon Apr 26, 2010 10:15 am; Thanked: 85 times; Followed by:3 members

by clock60 » Mon Dec 13, 2010 11:10 am

follow this link
https://www.beatthegmat.com/remainder-wi ... 71089.html

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