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Pick the most expensive prizes to exercise your quick estimation skills.

Numerical Estimation

Part of quantitative reasoning is numerical estimation — the ability to approximate numerical relationships quickly or with incomplete information.

Exercise your probabilistic reasoning by matching the pattern of cards needed fo...

Exercise your proportional reasoning skills by measuring ingredients for delicio...

Chalkboard Challenge trains quantitative reasoning to help with decision-making....

Raindrops exercises arithmetic, which is part of your set of problem-solving ski...