Test Prep Resources
In-depth guides and strategy articles for the GMAT, GRE, and SAT — written to actually move your score.
GMAT Weighted Average Problems: The See-Saw Method
The see-saw method turns two-group GMAT weighted average and mixture problems into a balance-beam ratio you can solve in seconds — but it breaks down past two groups or across multi-round removal-replacement problems. Four fully worked examples, the formulas for each case, and the five mistakes that most often flip the answer.
July 14, 2026