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GMAT Diagnostic Test Question 44

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Re: GMAT Diagnostic Test Question 44 [#permalink] New post 11 Feb 2010, 22:17
adalfu wrote:
doh! brilliant... thanks Igor010

i feel that all my quant errors are due to some sort of simple arithmetic mistakes (i'm a math/stats major but i've forgotten my basic algebra... sometimes i forget what 7x9 or 6x9 is -- i have to seriously think about it; it just doesn't come natural anymore).

thanks :P

You're welcome! :-D
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Re: GMAT Diagnostic Test Question 44 [#permalink] New post 15 Nov 2012, 11:20
I don't get the solution at all....

I can't see beyond the fact that for x^2 + y^2 = 100, x and y must be one of these combinations:

10, 0
-10, 0
6, 8
-6, 8
6, -8
-6, -8

In which case:

A) |x| + |y| = 10..... could be if 10, 0

B) |x| > |y| ..... could be if 10, 0

C) |x| > |y| +10 ........ not for any of the above combinations

D) |x| = |y| ....... not for any of the above combinations

E) |x| - |y| = 5 ....... not for any of the above combinations

Potential answer C, D or E.
Re: GMAT Diagnostic Test Question 44   [#permalink] 15 Nov 2012, 11:20
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