GMAT Math Tutorials: Best Tricks to Beat Data Sufficiency - Videos

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Data Sufficiency is a type of question, of which approximately one-third of all quant questions – across all topics – are. This is a special GMAT question format. What makes it unique is that it asks us to do something completely different than we are used to. In data sufficiency, we aren’t asked to solve questions at all – but only to figure out if they CAN be solved!
Data Sufficiency questions always follow the same format: we’re given an opening statement, in the form of:
“knowing that … something is true, are the following statements enough to tell… something else, and then we are given two separate statements, one and two.

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