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标题: OG DS-25 [打印本页]

作者: XIAOHUANHUAN    时间: 2008-8-16 18:07     标题: OG DS-25

OG DS-25

If i and j are integers, is i+j an even integer?

(1) i<10
(2) i=j

为什么答案是B呢?

我一直不明白,0是不是一个偶数呢?
因为如果0是偶数的话那么这个题目也就对了。请大虾指点

作者: samanthapa    时间: 2008-8-16 19:30

0是偶数,偶数定义为

divisible by 2 {...-4, -2, 0, 2, 4,...}


作者: 卡通猫王    时间: 2008-8-17 08:05

0 is an even number!

B

1) i is even, and j is even, and then i+j is even

2) i is odd, and j is odd, and then i+j is even

that is it!


作者: XIAOHUANHUAN    时间: 2008-8-20 06:42

明白了。谢谢!!!!




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