Letter from the President and CEO, GMAC xi

1.0 What Is the GMAT Exam? 2
1.1 What Is the GMAT Exam? 3
1.2 Why Take the GMAT Exam? 3
1.3 GMAT Exam Format 4
1.4 What Is the Testing Experience Like? 6
1.5 What Is the Exam Content Like? 6
1.6 Quantitative Reasoning Section 6
1.7 How Are Scores Calculated? 7

2.0 How to Prepare 8
2.1 How Should I Prepare for the GMAT Exam? 9
2.2 Getting Ready for Exam Day 10
2.3 How to Use the GMAT Official Guide Quantitative Review 2026–2027 10
2.4 How to Use Other GMAT Official Prep Products 12
2.5 Tips for Taking the Exam 12
2.6 Quantitative Reasoning Section Strategies 14

3.0 Math Review 16
3.0 Math Review 17
3.1 Value, Order, and Factors 18
3.2 Algebra, Equalities, and Inequalities 26
3.3 Rates, Ratios, and Percents 40
3.4 Statistics, Sets, Counting, Probability, Estimation, and Series 50
3.5 Reference Sheets 62

4.0 Quantitative Reasoning 74
4.0 Quantitative Reasoning 75
4.1 Tips for Answering Quantitative Reasoning Questions 76
4.2 Practice Questions 78
4.3 Answer Key 110
4.4 Answer Explanations 112

5.0 GMAT Official Guide Quantitative Review Question Index 184
5.0 GMAT Official Guide Quantitative Review Question Index 185

Appendix A Answer Sheet 192
Quantitative Reasoning Answer Sheet 193