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Prep-DS-35
If p and n are positive integers and p > n, what is the remainder when p2 - n2 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.
麻烦各位大侠帮我看看这题PREP怎么解 |
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