The Game of Mental Math Magic!

Fast, fun, and addicting!

Proof! is an award-winning math game that the whole family can enjoy. Fast, fun, and insanely addicting, this lightning-quick card game will have you working that mental math magic as you race to find creative equations hidden among nine number cards. Keep what you find and collect the most cards to win!

Got the cards 2, 8, and 10? Concoct an equation like 10 - 2 = 8!

Working with the cards 2, 5, 5, 10, and 20? Conjure up a beauty like 5 + 5 = 20 ÷ 2 = 10!

Allowing you to use almost any math symbols and all sorts of crazy equations, Proof! is unlike most math games: it's engaging for both students in a classroom and adults at a party.

Full game instructions for the card game can be found here.

Still can't get enough Proof! in your life? Check out the free, online game where you can compete with friends to rise up on the daily leaderboard. Or get those gears turning with one of our 300+ brain-benders called the Proof! Math Puzzle Challenges. Each carefully constructed puzzle consists of a set of nine cards that hides a challenging equation. Can you solve them all?

Proof! was created by Evermade in New York City. It is for 2 - 6 players, ages 9+, and takes less than 15 minutes to play. And if you like Proof!, you may also enjoy our other math game, Adsumudi.