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标题: 请问~~ GWD-3-16??? [打印本页]

作者: zhangpeiyu01 时间: 2006-10-11 07:01 标题: 请问~~ GWD-3-16???

GWD-3-Q16:

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.

答案C.

谢谢!

作者: kenlily 时间: 2006-10-12 07:02

n=6k+5/6k+1

这样简单些

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