GMAT Prep - Tough question: 1 of 7

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GMAT Prep - Tough question: 1 of 7

by GMATDUD » Mon Feb 04, 2008 3:38 pm
Hi Friends ,

I could not solve these questions and gave up . Can anyone help me ?



In addition , On the GMAT : Sq root (36) = +or - 6. Is it safe to assume -6 or is it always positive 6 only ?
cheers,

Dud.
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