Puzzles and Games
- KenKen Math Puzzles
- Puzzle PLAYGROUND
- John Conway's Game of Life
- Mathpuzzle.com
- Rubik's Online
- Aha Puzzles!
- Brain Teasers by Barry R. ClarkeÂ
- Sliding Block Puzzle Page
- The Diamond 16 Puzzle
- Combinatorial GamesÂ
- Puzzles with polyhedra and numbers
- Nick's Mathematical Puzzles
Pythagorean Pages
- It Is Wise, Generalize!: Mathematics & Informatics Quarterly by K. R. S. Sastry
- Expansion/Analysis of a Card Trick: Math Paths by Aaron Kazam Sherbany
- Exploring: Moduli Spaces by Jordan Ellenberg