作者humid (深蓝)
看板GMAT
标题[计量] PP1-DS 159
时间Sun Jun 7 14:05:41 2009
本人对於余数的问题常常搞不懂= =
If n is a positive interger and r is the remainder when
(n-1)(n+1)is divide by 24,what the value of r?
(1)n is not divisible by 2
(2)n is not divisible by 3
Ans:C
请牛牛们指点一下
谢谢罗
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1F：推 DreamKite:建议你用穷举法,考试时间没办法让你快速写答案 06/07 15:13
2F：→ DreamKite:A or B or C(AB交集) 每个都举两个例子就可以得证^^ 06/07 15:13
3F：推 Chest:请参考拙作#19aNBPCz，就是在讨论这一题 06/08 00:17