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Like Sudoku, but better!

August 20, 2010
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Just came across some fun math puzzles called Kenken.   I never got into the Sudoku craze, but I like these!

Here’s how to play:  (from Kenken.com)

Like Sudoku, even though difficulty may vary from puzzle to puzzle, the rules for playing KenKen are fairly simple:

For a 3×3 puzzle, fill in with numbers 1-3.
For a 4×4 puzzle, fill in with numbers 1-4.
For a 5×5 puzzle, fill in with numbers 1-5.
For a 6×6 puzzle, fill in with the numbers 1-6.
For a 7×7 puzzle, fill in with the numbers 1-7.
For a 8×8 puzzle, fill in with the numbers 1-8.
For a 9×9 puzzle, fill in with the numbers 1-9.

Do not repeat a number in any row or column.
The numbers in each heavily outlined set of squares, called cages, must combine (in any order) to produce the target number in the top corner of the cage using the mathematical operation indicated.
Cages with just one box should be filled in with the target number in the top corner.
A number can be repeated within a cage as long as it is not in the same row or column.

For a brief tutorial explaining how to play KenKen using examples, click here!

There is one of each level at kenken.com, but many more free ones at mathdoku.com

Also here’s a blog with a video explaining them and gives tips for the harder 9×9! puzzles.

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