[讨论]gwd-5-32

kuuiytt

Q32:

Is x an odd integer?

(1) x + 3 is an even integer.

(2) x/3 is an odd integer.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案是d,但是，我认为（1）中如果x是负3则x+3=0,是非奇非偶。

我选答案e

kuuiytt

哦，搞明白了！！谢了！

hiiamjo

你有一个概念性的错误，无论是正负数还是零，都存在奇偶数的区别。奇偶数并不是只对整数而言的。