If you need to know it for the new, next-generationGMAT, it's in this book. "Math Workout for the New GMAT, 4th Edition"includes:
More than 220 practice questions with full answer explanations to show you exactly what to expect on the Quantitative section of the new GMAT, covering data sufficiency, statistics, algebra, geometry, and more
A thoroughintroduction to the brand-new Integrated Reasoning section andquestion types: table analysis, graphics interpretation, multi-source reasoning, and two-part analysis
Proven strategies for acing tricky data sufficiency problems
Tips and tricks to help you effectively manage your time on geometry and algebra questions.