I would say the easiest way to solve such problems would be to substitute and play
For instance in this problem;
We are asked to answer question as to whether X>Y???
Plug n play....
X=4; Y=3 ---> Satisfies statement
X=-4; Y=3 ----> Still Satisfies statement
Eliminate options A and D from your list (helps if u have to guess at the end
2. (X^2 - Y^2)/X^2
plug n play again...
X=4; Y=3 ----->Satisfies statement
X=-4;Y=3------>still does satisfy.....
BINGO it has to be E......next question pls