KenKen
Kenken
- Date
- 2004 · confidence high
- Place
- Japan
- Credited to
- Tetsuya Miyamoto
- Field
- Knowledge & symbols
What it is
A trademarked arithmetic and logic puzzle invented by Japanese math teacher Tetsuya Miyamoto as an instruction-free way to train the brain.
What it led to
- global popularity as a math education puzzle
- use in schools to build arithmetic fluency
- spin-off puzzles like Calcudoku and Mathdoku
- daily puzzle features in newspapers and apps