Making up numbers on GMAT data sufficiency questions containing variables is a great strategy, as you probably know by now. What you might not know is this nuanced aspect of this strategy that will help you better answer Yes/No GMAT data sufficiency questions and avoid common wrong answers. Dominate the GMAT founder Brett Ethridge explains this important GMAT tip and applies it to a sample data sufficiency question. For a comprehensive video lesson teaching you everything you need to master GMAT D.S. questions, visit www.dominatethegmat.com/video-purchase/a-la-carte-topics/gmat-data-sufficiency-part-1/

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