GWD M9-26

jessie1981

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.

这道题不是太懂，请大家帮忙！

chichin

1) 16*x, x=1/16, 1/16=0.0624 no

         x=1/8, 1/8=0.125, yes

         so not sufficient

2) 8*x,  x=1/8, 1/8=o.125 yes

         x=1/4, 1/4=0.25  yes

         so sufficient.

 answer (B)

creativity

agree with chichin!