The fast paced game of mental math magic!

Proof! is an award-winning, fast, fun, and addicting math game that the whole family can enjoy! Work 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!

How to Play

Quick! Find an equation among the nine number cards on the table and shout the result before anyone else!

Once you've got one, tell everyone the proof! If your math adds up, keep the cards you used.

Deal more and keep going! When the deck runs out the player with the most cards wins!

What's in the Box?

The Proof! math game comes with 100 number cards and an instructions booklet. With numbers ranging from 0 - 100, some easier cards appear more than once and some not at all, a mix that was carefully crafted for optimal fun.


Can't get enough ?

Jumpstart your brain with over 300 cleverly constructed Proof! puzzles. Each challenge poses a new set of nine cards that hides a tricky equation. Can you find the proof?

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I would definitely recommend this game to a teacher. [Proof! is] an awesome, fun game for students to engage in while learning math!
LOVE this game! [...] Fast moving and different. [...] A real thinking person's game. [...] Accessible for so many ages and abilities.