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Title: Outdated, Incorrect and pretty much useless
Review: Don't bother with this book, there are much better books out there. The questions are often awkward and don't seem to match what I ran into on the GMAT. Additionally they teach you stuff which you don't even need for the GMAT. .. For example - the quadtratic formula.. Don't need it!My guess is these books aren't updated as frequently as some of the books by Kaplan/Princeton Review.
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