GMAT Practice Questions Questions 61 - 86, pg 160 - 163
Free online video lessons from khanacademy
covering the practice questions in the problem-solving math section of The Official Guide for GMAT Review.
It would be best that you go through the GMAT practice test questions in the Study Guide first and then look at the videos for the questions that you might need help in.
The videos on these lessons are for GMAT Practice Questions 61 - 86 (starting from page 160 in the Study Guide)
Questions 61-64, pg. 160
Questions 65-69, pgs. 160-161
Questions 70-75, pg. 161
Questions 76-80, pg. 162
Questions 81-86, pgs. 162-163
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