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Find the remainder

This topic has 1 member reply
snapplesf Junior | Next Rank: 30 Posts
Joined
09 Mar 2007
Posted:
14 messages

Find the remainder

Post Fri Mar 23, 2007 11:01 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    source - GMATPrep
    --------------------------------------------

    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 Community Manager
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    Post Fri Mar 23, 2007 6:25 pm

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