Hi All,

This question can be solved by TESTing VALUES. The key is to keep the values relatively small and think about how the square root sign impacts the math:

We're told that S > 0 and (r/s)^1/2=s

We're asked for the value of R.

IF....

R = 8

S = 2

\sqrt{4} = 2

So we're looking for an answer that = 8 when S = 2....

Answer A: 1/2 NOT a match

Answer B: \sqrt{2} NOT a match

Answer C: 2\sqrt{2} NOT a match

Answer D: 2^3 = 8 This IS a MATCH

Answer E: 2^2 - 2 = 2 NOT a match

Final Answer:

GMAT assassins aren't born, they're made,

Rich

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Official Guide 2016 Question Breakdown:

http://gmatclub.com/forum/empowergmat-blog-198415.html#p1527977

Rich Cohen

Rich.C@empowergmat.com

http://www.empowergmat.com

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