GWD-1-26 & GWD-1-29

shirley_zhu

Q26: If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?

(1)     The tens digit of k + 9 is 3.

(2)     The tens digit of k + 4 is 2.

                  

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.

Q29:

If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be

A.    2

B.     5

C.     6

D.    7

E.     14

请教一下上面这两道题的解题思路，碰到这种数位的问题好像脑子特转不过来，谢谢

不知不觉

1-26    http://forum.chasedream.com/dispbbs.asp?BoardID=22&ID=65025

1-29    http://forum.chasedream.com/dispbbs.asp?BoardID=22&ID=65213

请看置顶讨论贴

shirley_zhu

谢谢MM，搜索的时候竟然没发现