- Games, puzzles,...
- Monty Hall problem
- Le plus grand périmètre
- The Greek cross
- dudeney puzzle
- Un gioco di configurazione
- Slot machine 2
- Slot machine
- Optical Illusions
- Move or blink ...?
- Optical Illusions 2
- Optical Illusions
- Ricostruire un quadrato
- Where is the red ?
- The game of 8
- The game of 24
- Sliding Game
- AN EASY DISSECTION PUZZLE
- Classical Chinese Puzzles
- THE BUN PUZZLE.
- THE CHOCOLATE SQUARES.
- Ramsey theory
- The Mystery of the Grazing Goat
- Dido's problem
- Lights Out (Game with Solution)
- Regions with the same area
