GMAT Data Sufficiency Problems
Questions 151 - 155, pg 290
This series of videos by khanacademy will show you how to answer the practice questions in the data sufficiency math section of the
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 151 - 155 (starting from page 290 in the Study Guide)
151-153, pg. 290
Questions 154-155, pg.290
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