If x, y and z are positive integers, is xz even?
1) xy is even
2) yz is even
1) xy is even
2) yz is even
Last edited by magical cook on Sat Jan 05, 2008 8:55 pm, edited 1 time in total.
how did you conclude C....both conditions together are not sufficiant for the response.
xy is even =>both x and y even (or) x even and y odd (or)x odd y even
yz is even =>both y and z even (or) y even and z odd (or)y odd z even
if you take the case that
i)(x odd and y even) and (y even and z odd ) = xz is odd
ii)for anyother case xz is even.
so you cant really conclude using both the statements together.
