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Chalkboard Challenge

Chalkboard Challenge improves the quantitative reasoning and problem-solving skills needed to make smart decisions, including those involving finances.

Numerical Estimation

Numerical estimation is the ability to approximate numerical relationships quickly or with incomplete information.

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Top That

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

Magic Chance

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

Halve Your Cake

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


Raindrops uses arithmetic to improve problem-solving skills. Play Raindrops to b...