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Rating: 
Summary: helpful
Review: Covers the vast majority of math material that you will encounter on the GMAT. The author's style is conversational, so this book is especially good for people who are more verbal oriented than math oriented. Explanations are easy to follow but also in a good amount of depth. I especially liked the explanations of how everyday formulas were derived. Much better than just memorizing the formulas. Not a lot of practice problems, so you'll have to get those elsewhere.Definitely skip the introduction. It will insult your intelligence and make you want to burn the book. Nevertheless, the remaining 18 chapters are solid.
Rating:
Summary: helpful
Review: helpful math review I recieved a lot out of reading this book.
Rating: 
Summary: Excellent for Review & Reference
Review: I purchased this book a couple of years ago when I was preparing to take the GRE, and I desperately needed some math review. The book was perfect for that purpose, but I've also found myself referring to it many times since then. It's a great reference for all that math you had in high-school and/or college and don't use enough to keep fresh in your mind. I've used it quite a few times at work as well as with some of the classes I've taken in grad school (Computer Science). The only think that keeps me from giving it 5 stars is the lack of an index, which makes it difficult to look up specific topics. The book is small enough and so well organized, though, that that is a minor annoyance.
Rating: 
Summary: Needs a better review for accuracy
Review: Lots of good explanations - but also many sidebars which don't help. Biggest problem is lots of errors in the math examples which hopefully will be caught if reprinted:
pg20 - 94 = 2 x 2 x 2 x 2 x 3 (meant to be 96=2x2x2x2x2x3)
pg21 - this time correct prime factorization but still says 94
pg100 - products of 4 & 9 roots mixes addition and multiplication... 3 errors in the step-by-step process; complicated by using yet another "+" when should be "X" in the description afterwards.
pg103 - denominator of final answer should be 5, not 15
Frustrating I've been marking the book up for errors.
Rating:
Summary: Needs a better review for accuracy
Review: Lots of good explanations - but also many sidebars which don't help. Biggest problem is lots of errors in the math examples which hopefully will be caught if reprinted:
pg20 - 94 = 2 x 2 x 2 x 2 x 3 (meant to be 96=2x2x2x2x2x3)
pg21 - this time correct prime factorization but still says 94
pg100 - products of 4 & 9 roots mixes addition and multiplication... 3 errors in the step-by-step process; complicated by using yet another "+" when should be "X" in the description afterwards.
pg103 - denominator of final answer should be 5, not 15
Frustrating I've been marking the book up for errors.
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