MOD-3 SUMZ

MOD-3 SUMZ is competitive game of skill for two or more players. Five cards are laid out and players look for two sets of cards that have the same “sum”. Whoever finds two such sets first takes the cards. New cards are then laid out to replace the cards that were removed. After all the cards have been played through, whoever has found and collected the most cards wins!

Each card is divided into four quadrants. The top-left quadrant of each card contains 0, 1 or 2 purple pentagons; the top-right quadrant contains 0, 1 or 2 blue triangles; the bottom-left quadrant contains 0, 1 or 2 red hearts, and finally, the bottom-right quadrant contains 0, 1 or 2 green circles. Think of the quadrants as slots for the respective shapes. Cards are summed together slot-wise, meaning that one adds the numbers of each shape in the respective quadrants with one another. This sum is then taken Mod-3, so that only the remainder after dividing by 3 matters, and the sum of the respective shapes is always 0, 1 or 2.

MOD-3 SUMZ is the perfect game to play with your family and friends. It is easy to learn, and it is great exercise for your mind. It can also be played as a solitaire or collaborative game. When played as a collaborative game everyone works together to solve each hand.

Try MOD-3 SUMZ today, and play it again, and again, and again!

MOD-3 SUMZ was created by Ben Fried and Ford Lenchner in the course of their internships with American research mathematician Jon Lenchner.

We hope you love MOD-3 SUMZ as much as we do!