GWD10-Q26

Q26:

What is the greatest common factor of the positive integers j and k?

(1)     k = j + 1

(2)     jk is divisible by 5.

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.

Answer: A

请NN解释一下，完全没有思路，谢谢。

只找到过以前的一个讨论，但是完全没看懂，有NN帮忙再解释一下吗或者给个以前的链接？

谢谢

终于找到别的讨论了

http://forum.chasedream.com/dispbbs.asp?boardid=22&replyid=1258571&id=74803&page=1&skin=0&Star=1

奇怪的是在搜索里输入关键字‘GWD’却没找到过这个讨论