GMAT preparation can take you about 3 – 6 months of practice and strengthening of foundations based on the GMAT syllabus. Since GMAT is now a computerized test, it offers many new challenges. The Official Guide for GMAT Review, 11th Edition offers 800 retired GMAT questions and thorough explanations of the answers. Practicing with questions that have appeared on the GMAT exam before will prepare you for the types of questions you’ll see when you take the real thing. This Guide will help you learn what you need to know to answer those questions correctly.