GMAT Official Guide 2018 Quantitative Review: Book + Online

Table of Contents Letter from the President and CEO, GMAC(r) v

1.0 What is the GMAT(r) Exam? 2

1.0 What is the GMAT(r) Exam? 3

1.1 Why Take the GMAT(r) Exam? 3

1.2 GMAT (r) Exam Format 4

1.3 What Is the Content of the Exam Like? 5

1.4 Integrated Reasoning Section 6

1.5 Quantitative Section 6

1.6 Verbal Section 7

1.7 Analytical Writing Assessment 7

1.8 What Computer Skills Will I Need? 7

1.9 What Are the Test Centers Like? 7

1.10 How Are Scores Calculated? 8

1.11 Test Development Process 9

2.0 How to Prepare 10

2.0 How to Prepare 11

2.1 How Can I Best Prepare to Take the Test? 11

2.2 What About Practice Tests? 11

2.3 Where Can I Get Additional Practice? 12

2.4 General Test-Taking Suggestions 12

3.0 Math Review 14

3.0 Math Review 15

3.1 Arithmetic 16

3.2 Algebra 27

3.3 Geometry 35

3.4 Word Problems 47

4.0 Problem Solving 56

4.0 Problem Solving 57

4.1 Test-Taking Strategies 58

4.2 The Directions 58

4.3 Sample Questions 60

4.4 Answer Key 85

4.5 Answer Explanations 87

5.0 Data Sufficiency 148

5.0 Data Sufficiency 149

5.1 Test-Taking Strategies 150

5.2 The Directions 152

5.3 Sample Questions 154

5.4 Answer Key 166

5.5 Answer Explanations 167

Appendix A Answer Sheets 214

Problem Solving Answer Sheet 215

Data Sufficiency Answer Sheet 216