Data Sufficiency

Is |x-y| > |x| - |y|?

1. y<x
2. xy<0

Just pick numbers (or use number line analogy)with these cases:

case1: x-> positive y->positive
case 2: x->positive y->negative

case 3: x->negative y->negative
case 4: x->negative y->positive

See if u can prove insufficiency. usually case 1 and case 2 would tell u the same thing as case 3 and case 4

Stmt I

y<x

y=2 x=3

|x-y| > |x|- |y| -> no

y= -2 x=3

|x-y| > |x|- |y| -> yes

INSUFF

Stmt II
xy <0

x-> positive y->negative or x->negative and y positive


Always |x-y| > |x| - |y|

SUFF

Choose [spoiler]B[/spoiler]