Q3:

What is the remainder when the positive integer n is divided by 2?

(1) When n is divided by 5, the remainder is an odd integer.

(2) When n is divided by 10, the remainder is an odd 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B.

怎么不是D啊？奇数的话无论被2怎么除都是余数1啊？

B,

the number must be an odd number and the remainder will be 1

1) 8/5 -余数 odd number, 8/2 余数0

13/5 余数 odd number, 13/2 余数 1 -- not sufficient

just plug in some numbers to try