Q29:

Is the integer n odd?

(1)   n is divisible by 3.

(2)   2n is divisible by twice as many positive integers as n.

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.

Answer: B

主要就是（2）没有看懂？谁能帮我解释一下

Q29:

Is the integer n odd?

(1)   n is divisible by 3.     n=0

(2)   2n is divisible by twice as many positive integers as n.  所有原来n 的除数乘2 可以是2n的除数 所以2倍关系成立 偶数的话倍数关系不成立除数会重复