Developed by Manhattan GMAT's high-caliber instructors, these 8 volumes offer students a competitive edge by providing in-depth instruction in the test's principal content areas. The Number Properties Guide provides a comprehensive analysis of the properties and rules of integers tested on the GMAT, allowing you to learn, practice, and master everything from prime products to perfect squares. Each chapter builds comprehensive content understanding by providing rules, strategies, and in-depth examples of how the GMAT tests a given topic and how you can respond accurately and quickly. The Guide contains a total of 161 "In-Action" problems of increasing difficulty with detailed answer explanations. The content of the book is aligned to the latest Official Guides from GMAC (12th edition). Purchase of this book includes one year of access to Manhattan GMAT's online practice exams and Number Properties question bank.