GMAT Data Sufficiency Problems
Questions 107 - 120, pg 287 - 288
Free online video lessons from khanacademy
covering the practice questions in the data sufficiency 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 this lesson are for GMAT Practice Questions 107 - 120 (starting from page 287 in the Study Guide)
Questions 107-109, pg. 287
Questions 110-111, pg. 287
Questions 112-115, pg. 287
Questions 116-118, pg. 288
Questions 119-120, pg. 288
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