PREP某数学题请教

论坛设施 · 发表于 2010-6-21 23:14:13

麻烦各位大侠帮我看看这题PREP怎么解，谢谢

If P and N are positive inegers 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

tks~

augboy · 发表于 2010-6-21 23:31:41

http://forum.chasedream.com/GMAT_Math/thread-465666-1-1.html

PREP某数学题请教

所属分类: GMAT考试

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