Numeration
- Abacuses: counting, Suan pan, Soroban, Roman, Stchioty
- The number circuit, a tool for developing the sense of operations and mental calculation
Topology and reasoning
- The L game, the strategy of translations, symmetries and rotations
- Hanoi Mystery, the puzzle of upside-down towers with a hint of the unknown
Zebra puzzles
Games and techniques to solve all zebra puzzles. Progress at your own pace with our carefully measured puzzles, from the simplest to the most challenging. Use the zebra puzzle editor to solve them or even create your own.
- Zebra puzzles – summary