**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 (2017 edition)**

Problem Solving: 8, 21, 22, 27, 31, 33, 45, 46, 49, 57, 59, 63, 66, 67, 70, 74, 76, 78, 84, 92, 93, 94, 104, 110, 121, 137, 143, 152, 163, 170, 171, 172, 175, 183, 187, 188, 191, 211, 217, 222, 224, 227, 229, 230

Data Sufficiency: 235, 245, 246, 247, 261, 268, 271, 272, 273, 278, 279, 288, 292, 293, 301, 305, 307, 316, 335, 338, 345, 349, 352, 355, 357, 374, 379, 384, 398, 399, 401, 404

**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* (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.