Mathdoku (also known as KenDoku, Calcudoku or KenKen®) is a type of arithmetic/logic puzzle invented by Japanese math teacher Tetsuya Miyamoto. The puzzles were intended to be an instruction-free method of training the brain.
As in sudoku, the goal of each puzzle is to fill an NxN grid with digits (1 to N); such that...
- No digit appears more than once in any row or column.
- The numbers in each cage produce a given target number, when combined using the mathematical operation provided.
- Digits may be repeated within a cage, as long as they aren't in the same row or column.
This electronic version of the game is available on iPhone, iPad & iPod Touch and features:
- 8 modes of play (to challenge the keanest minds)
- GameCenter integration, so you can check how buffed your brain-cells are
- Infinite puzzle combinations, so you'll never need to buy another puzzle book
The puzzles are auto generated; so no pesky in-app-purchases to worry about and no need to be on-line. (Nice if you're on holiday and don't want to worry about data roaming charges).