I have to admit, I’m addicted to KenKen Puzzles. 🙂 KenKen Puzzles are a style of arithmetic and logic puzzle invented in 2004 by Japanese math teacher Tetsuya Miyamoto, who intended the puzzles to be an instruction-free method of training the brain. This puzzle game helps students improve their calculation skills, logical thinking and persistence.

#### Rules for Playing KenKen

Like Sudoku, no digit can be repeated in a row or column. In addition, the numbers must combine to form a target number using a specific operation.

- Fill in the numbers from 1 to the grid size. For example, this 4×4 KenKen puzzle uses digits 1, 2, 3 and 4.
- No digit may be repeated in a row or column.
- The numbers within each heavily outlined set of squares, called cages, must combine (in any order) to produce the target number in the top corner using the mathematical operation indicated.
- Cages with just one square should be filled in with the target number in the top corner.
- A number can be repeated within a cage so long as it is not in the same row or column.

#### KenKen Resources

Here are some resources if you would like to use KenKen Puzzles in your classroom.