Is |r|*s = |s|*r?

Question

Is |r|*s = |s|*r?

(1) rs > 0
(2)  r^2=s^2

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jayantbakshi · Answer

Using A: Yes. rs>0 means both are same sign.
Using B: No.  r^2=s^2  means |r| = |s|. But r and s may have opposite signs, so No.

gmat1393 · Answer

I think its A

1 implies both r and s have the same sign so |r|.s and |s|.r will yield the same result.

2 implies that they can have different signs.It may be yes or no.

+1 if this helps!

GyMrAT · Answer

Statement 1: rs > 0 r > 0, s > 0 or r < 0, s < 0 r & s have the same sign r = 1, s = 2 , we get YES as answer r = -1, s = -2 , we get YES as answer. Statement 1 is Sufficient. Statement 2: r^2=s^2 r & s can take any sign or both are equal to 0 r = 0, s = 0 . we get YES as answer r = 1, s = -1 , we get NO as answer Statement 2 is Not Sufficient. Answer A. Thanks, GyM

Is |r|s = |s|r?

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