young_gun wrote:

If W,X,Y, and Z are integers such that W/X and Y/Z are integers, is W/X and Y/Z odd?

(1) WX + YZ is odd

(2) WZ + XY is odd

1) WX+YZ= odd integer. this means WX or YZ is even and one is odd.

lets say we have 2*2 + 3*3 = odd. and 2/2 and 3/3 are both odd.

But if we have 12*3 + 3*3 =odd and we have 12/3 and 3/3 which are not both odd. Insuff.

2: Again one is even and one is odd

W/X and Y/Z must hold true. WX -> 12:3 and YZ-> 9:3

12*3+9*3 = odd. 12/3=4 and 9/3=3 So both are not odd.

I think B is suff. I cant find any combos where W/X and Y/Z are both odd.

With WZ+XY = odd.