VIDEO SOLUTIONS TO THE OFFICIAL GUIDE FOR GMAT QUANTITATIVE REVIEW, 2ND EDITION
NUMBER THEORY
Problem Solving: Begins at page 62
11, 31, 68, 70, 78, 98, 109, 112, 125, 144, 149, 152, 164, 169, 170, 172.Data Sufficiency: Begins at page 153
3, 16, 20, 35, 31, 39, 44, 45, 49, 64, 66, 78, 79, 86, 87, 90, 92, 104, 110, 113, 115, 118, 119.