Q26:

In the decimal representation of x, where 0 < x < 1, is the tenths digit if x nonzero?

(1)     16x is an integer.

(2)     8x is an 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B

请教大侠该如何解?

看了半天才看明白，你打错一个字，of x不是if x
条件一得出x是0.0625（1/16）的倍数，如果0.0625再乘以其他数十分位不一定为0
条件二得出x是0.25（1/4）的倍数，如果0.25再乘以其他数十分位永远不可能是0

(注，只在x大于0，小于1的范围内成立）