Invented by a Japanese teacher, the KenKen puzzle adds a layer of math to the traditional Sudoku puzzle. You can play KenKen as a Flash game below!

Rules

Fill in each box with a number from 1 to the size of the puzzle. For example, if you're playing a 6x6, you would use 1 through 6.

Do not repeat a number in any row or column.

The numbers in each heavily outlined set of squares (called a cage) must combine in any order to produce the target number in the top corner using the mathematical operation listed.