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Review title: This book contains several errors
Product review: I decided to use this book as a supplement to a prep class I took. I was extremely disappointed to find that the book contains content errors. I am halfway through the book and I have already found 2 errors. If I had not already studied for the GMAT I would have gotten these problem types wrong on the GMAT. This book is also does not show you how to shorten your computations. I think this book is only good for a refresher and should be accompanied by a more thorough guide.
