## Additional Practice

Each of the above video lessons features a Reinforcement Activities box containing practice questions that are **specifically related** to the particular concepts covered in that lesson (e.g., the lesson on Calculating Combinations in Your Head). On the other hand, the links below will take you to practice questions that test a wide variety of questions under the **general topic** of Counting. Given this, you may find it beneficial to work on the questions below AFTER you’ve mastered the content in the Counting module above.

- Official GMAT questions about Counting- Problem Solving

- Official GMAT questions about Counting - Data Sufficiency

## Practice from the Official Guides

**Official Guide for GMAT Review (2019 edition)**

Problem Solving: 140, 148, 182, 187, 201

Data Sufficiency: 331

**Official Guide for GMAT Review (2018 edition)**

Problem Solving: 140, 148, 182, 187, 201, 214

Data Sufficiency: 331

**Official Guide for GMAT Review (2017 edition)**

Problem Solving: 129, 166, 169, 174, 186, 209

Data Sufficiency: 317

**Official Guide for GMAT Review (2016 edition)**

Problem Solving: 117, 148, 152, 158, 172, 228

Data Sufficiency: 73

**Official Guide for GMAT Review (2015/13th edition)**

Problem Solving: 124, 128, 133, 148, 228

While answering practice questions from the *Official Guide for GMAT Review* (2019, 2018, 2017, 2016 or 2015), you can enter your responses directly into our downloadable **Improvement Chart**. This will help track your progress and identify areas of weakness.