**Additional Practice**

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

Sum of 9

Most likely interval

Sets M and T

5 coin flips

10 envelopes

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

120 marbles

Rosebushes

Six coin flips

Dice game

Juniors and seniors

Three coin tosses

Business school siblings

4 fair dice

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

2 girls and 2 boys

Random bouquet

Four expressions

Andrew and Karen

Matching socks

Littermates

__Data Sufficiency__** (level of difficulty: 650 to 800)**

Leila at carnival

Selecting representatives

Red ball vs white ball

White or even number

**Practice from the Official Guide**

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

Problem Solving: 11, 142, 162, 170, 221

Data Sufficiency: 236, 297, 302

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

Problem Solving: 11, 123, 146, 154, 194, 221

Data Sufficiency: 236, 283, 287

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

Problem Solving: 8, 80, 129, 136, 202, 219

Data Sufficiency: 7, 50, 140

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

Problem Solving: 10, 68, 107, 173, 193, 215

Data Sufficiency: 3, 39, 125

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.