Q11:

The product of the units digit, the tens digit, and the hundreds digit of the positive integer m is 96. What is the units digit of m?

(1) m is odd.

(2) The hundreds digit of m is 8.

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.

我的答案是D

我错了 应该是A, 请大家注意陷阱！

The product of the units digit, the tens digit, and the hundreds digit of the positive integer m is 96. What is the units digit of m?

(1) m is odd.

(2) The hundreds digit of m is 8.

xyz => integer m, the product of x, y and z is 96, and we want to konw what z is

1) m is odd, since m is odd, that means z is odd; since x * y * z = 96 = 2 * 2 * 2 * 2 * 2 * 3, and z is odd, thus z has to be 3, thus 1) by itself is sufficient to know the answer

2) the hundres digit of m is 8 => so x = 8, since 96/8 = 12 = yz, z could be 2, 3, 4, 6, thus 2) by itself is not sufficient to know the answer

thus the anwser is a)