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GMAT Prep - X&Y

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Source: — Problem Solving |
Junior | Next Rank: 30 Posts
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by sushilmore » Mon Sep 01, 2008 4:41 pm
Ans C.

If we use x=1 and y=1, only II is greater than 1/sqrt(x+y)

Also if we use x=4 y=9

Also if x=9 y=4
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by rosh26 » Tue Sep 02, 2008 10:11 am
Do the experts have a method to solve this problem besides picking numbers?

I just think picking numbers may take a lot of time, especially when dealing w/ radicals.
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by Ian Stewart » Tue Sep 02, 2008 11:28 am
Ron and I offered different approaches which do not require picking numbers here:

www.beatthegmat.com/question-gmatprep-t15503.html
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