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GMAT Data Sufficiency Problems
Questions 1 - 27, pg 278 - 279

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.

These video lessons are for GMAT Practice Questions 1 - 27 (starting from page 278 in the Study Guide)

Questions 1-5, pg. 278

Questions 6-9, pg. 278

Questions 10-15, pgs. 278-279

Questions 16-21, pg. 279

Questions 22-27, pg. 279

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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