Q13:For any positive integer x, the 2-height of x is defined to be the greatest nonnegative integer n such that 2ⁿ is a factor of x. If k and m are positive integers, is the 2-height of k greater than the 2-height of m ?

(1)
k > m (2) k/m is an even 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.

Q13的题目理解有问题，哪位给解释一下？

the 2-height of x is defined to be the greatest nonnegative integer n such that 2n is a factor of x.看不懂

就是把一个数中的2都分离出来

比如18，它的2－height是2^1, 而16的2－height则是2^4，所以条件（1）不可以