govinam wrote:

This is from the

OG quant review problem solving section. I'm not satisfied with the book's explanation... I would appreciate a more detailed explanation. Thanks.

125. If x is an integer and y=3x+2, which of the following CANNOT be a divisor of y?

A. 4

B. 5

C. 6

D. 7

E. 8I narrowed it down to C or D but don't know how to arrive at the OA. Please explain. Thanks.

Try plugging numbers, trying for x=0,1,2,3,4,5 we get

y = 2,5,8,11,14,17

Hence we can easily see that 4,5, & 8 are out. Additionally 14 is divisible by 7. Hence answer is C.