Problem Solving

试题详情

题目:

If n is a prime number greater than 3, what is the remainder when n2 is divided by 12?

选项:

A、0
B、1
C、2
D、3
E、5

答案:

B

提问:

老师您好,这道题我除了试数也看了管老师的视频,在视频中管老师把题写成了这样,我不太懂n=3A+1和n=3A+2是怎么出来的。谢谢老师![img=/resource/2017-06/13177-1496377020.jpg]
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