OG DS-25

XIAOHUANHUAN

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

samanthapa

0是偶数，偶数定义为

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

卡通猫王

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!

XIAOHUANHUAN

明白了。谢谢！！！！