儿子的题,请教哪位知道怎么做?

来源: 于 2012-06-30 09:59:30 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

For every letter, an alphabetized list has 3 words that begin with that letter. The word "SALE" could be the ? entry on the list.

A) 51st   B) 53rd    C) 54th     D) 56th

 

另一个题:

The ones' digit of the largest nine-digit perfect square is

A) 0    B) 1     C) 4     D) 9

谢谢!