2005年8月，第11版OG正式发布。通常来讲Official Guide for GMAT Review (OG)每隔3-5年发布一个新版，第10版在2000年出版。

第10版OG只有一本书，包含1400多道题，第11版OG分成三本书发布，800+300+300=1400，披露的题目总数相较于第10版OG基本没变。包括：

• The Official Guide for GMAT Review, 11th Edition （800题）
• The Official Guide for GMAT Verbal Review （300题）
• The Official Guide for GMAT Quantitative Review  （300题）

三本OG及官方模考软件GMATPrep里面的题目互不重合（the Official Guide for GMAT? Review, 11th Edition, the Official Guide for GMAT? Quantitative Review, the Official Guide for GMAT? Verbal Review, and GMAT? Prep.

This Guide offers 300 real GMAT? questions, with answers and explanations, to help you focus your verbal skils in the following areas:

• Reading Comprehension
• Critical Reasoning
• Sentence Correction
• Analytical Writing Assessment

The Official Guide for GMAT? Verbal Review focuses on your ability to read and comprehend written material, to reason and evaluate arguments, and to correct written material. This targeted review will help you get the most out of you study time and prepare you for the GMAT? exam.

The only study guide with 800 real GMAT? questions—and their answers—by the creators of the test. In addition to the questions and answers, this guide features:

• NEW diagnostic section that helps you assess where to focus your test-prep efforts
• NEW organization of questions in order of difficulty to save you study time
• a comprehensive math review covering the topics tested on the GMAT? exam (arithmetic, algebra, geometry, and word problems)
• approximately 270 Analytical Writing Assessment topics

The Official Guide for GMAT? Review, 11th Edition contains 800 retired GMAT? questions, with thorough explanations. Answering questions that have appeared on the GMAT? exam before will give you experience with the types of questions that appear on the test. This Guide will help you learn what you need to know to answer the questions correctly.

This Guide offers 300 real GMAT? questions, with answers and explanations, to help you focus your math skils in the following areas:

• Arithmetic
• Algebra
• Geometry  
• Problem Solving
• Data Sufficiency

The Official Guide for GMAT? Quantitative Review will help you solve equations, interpret data, coordinate geometry, and determine probability with assurance and ease. This targeted review helps you get the most out of you study time and improves your familiarity with the kind of questions found on the GMAT? exam.