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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