Languages. Shapes. Logic. Computation. And a rival to sudoku.
What makes a great puzzle? Five books, five answers.
Category: Catriona Shearer, Puzzle Wizard
11 Geometry Puzzles That Drive Mathematicians to Madness
This high school math teacher is drawing low-key comparisons to Richard Feynman.
Felt-Tip Geometry
Four beautiful new puzzles.
Six new geometry puzzles. How many can you solve?
Catriona Shearer strikes again.
Geometry Puzzles for a Winter’s Day
Fight cold with math.
The Tilted Twin (and other delights)
Three geometric treats from your favorite puzzler. Fields Medalists welcome.
Math with Bad Drawings 