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If P and N are positive integers and P>N

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shrads.jp
 Post subject: If P and N are positive integers and P>N
 Post Posted: Sat Dec 19, 2009 9:38 pm 
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Students


Posts: 11
HI Ray,
I faced this sum in GMAT Prep and tried solving it by the algebraic method u explained in the last thread, but i got it wrong ,later when i used substitution method i got it correct .Kindly let me know whether this method is to be specifically used or its generic

If P and N are positive integers and P>N , what is the remainder when P^2 – N^2 is divided by 15?
1) The remainder when P+N is divided by 5 is 1.
2) The remainder when P-N is divided by 3 is 1.

OA – E
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RonPurewal
 Post subject: Re: If P and N are positive integers and P>N
 Post Posted: Sat Jan 09, 2010 5:09 am 
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ManhattanGMAT Staff


Posts: 7146
hi -

where is "the last thread"?

you should probably just continue the discussion in that thread, rather than starting an entirely new thread.

thanks
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