A 9-year-old scrawls an innocent problem... and suddenly 3D surfaces are intersecting in 4D space.
Visually stimulating. Mathematically rich.
Four different (and wise) answers.
Math education is succeeding beautifully... for the right definition of "success."
Four beautiful new puzzles.
And 20 more of my proudest math cartoons.
Four teams. Four probabilities. This shouldn't be that hard... right?
Catriona Shearer strikes again.
A pencil-and-paper game for the snake-fearing (or snake-loving) mathematician.