## Additional Practice

NOTE: In each of the above video lessons, you’ll find a **Reinforcement Activities **box containing several practice questions that are specifically related to the concepts covered in that lesson (e.g., the lesson on the Fundamental Counting Principle). Conversely, the practice questions below cover a variety of topics under the umbrella of GMAT Counting, and are intended for general reinforcement.

Given this, you may find it beneficial to work on the questions below __after__ you’ve mastered the module content by watching the video lessons and answering concept-specific practice questions from the Related Resources boxes. For more on this learning strategy, visit our course overview page.

__Problem Solving__** (level of difficulty: 350 to 500)**

Temporary employees

__Problem Solving__** (level of difficulty: 500 to 650)**

8 teams in a league

Mobsters

Posting letters

Medical experiment

Cycling race

Palindrome

Carson family

Basketball team

Stock exchange codes

Team with exactly 2 women

University math department

__Problem Solving__** (level of difficulty: 650 to 800)**

Shake hands with 3 people

5-letter words

Triangles and quadrilaterals

Number of rectangles in plane (geometry, counting)

16 different gifts

Bill’s 12-card deck

Triangles in the plane

__Note__: Data sufficiency questions related to counting are very rare.

## Practice from the Official Guides

**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* (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.