The Clear, Simple Guide to GMAT Problem Solving
-Categorization of every problem type in Problem Solving, including where to find them in the Official Guide
-Explanations on how to approach each sort of problem, both mathematically and intuitively
-Over 50 detailed question breakdowns and answer explanations for Official Guide questions
-The only guide you'll need to buy for Problem Solving!
-Minimum price: $20
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