GreenlightTestPrep wrote:
We can solve this question using matching operations
Given:
Quantity A: xy/w
Quantity B: yw/x
Since we're told that w is POSITIVE, we can safely multiply both quantities by w to get:
Quantity A: xy
Quantity B: yw²/x
Since we're told that x is POSITIVE, we can safely multiply both quantities by x to get:
Quantity A: x²y
Quantity B: yw²
Dont make thing complicated, after a few step, you get x-w in quantity a and 0 in quantity b. as we are given that x is bigger than w, hence quantity a is always greater.
Since we're told that y is POSITIVE, we can safely divide both quantities by y to get:
Quantity A: x²
Quantity B: w²
If x and w are both positive, AND x > w, then we can be certain that x² > w²
Answer: A
I am always confused with one thing... please let it clear. I did every thing right upto
Quantity A: x²
Quantity B: w²
then thought if A and B both are integer, A is bigger, but if A and B are both decimal, I mean 0<x<1 and 0<y<1, then B is bigger.
if x=1, then 0<w<1; 0<y<1 hence x>x^2, y>y^2
So ans is D. That is my confusion.
I know I am wrong in this case, do not know why? Please explain.
I actually have the same question. Can anyone please explain? I think there is no restriction so the variables can be positive fractions. In this case the answer is D. I am confused.