Last time on Math Monday: Finger Twisters
Last Monday we played finger-twisting math games that explore symmetry, permutations, and problem solving. We learned the International math salute, explored symmetry by crossing our arms the wrong way, twisted our hands 720° while balancing a glass of water on our palm, drew different shapes in the air with our two hands at the same time, and ended with a trick involving two pen caps.
Go deeper. Here’s James Tanton, creator of the Global Math Project, demonstrating the International Math Salute.
The cup-balancing arm-twisting movement is featured in Binasuan, a folk dance from the Philippines that is traditionally performed with full goblets of wine.
Here’s a video that explains the tricky move in the 2 pen-cap trick (you can also use two wine corks, two rooks, or two chapstick tubes):