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KenKen - Free Brain Game
Play: Small | Medium | Large |
KenKen, also known as Mathdoku, is a math-based logic puzzle similar to Sudoku. Fill in the table with the appropriate numbers. For this 4x4 KenKen table, use only the numbers "1" through "4" (see instructions below). To begin, click the Medium link under the picture at left. This opens the game in a pop-up window. |
The game of KenKen was invented in 2004 by Tetsuya Miyamoto, a Japanese math teacher. Play this game regularly to strengthen your arithmetic ability and logical reasoning.
Note: This game may not work in Internet Explorer. Try opening it in FireFox or Google Chrome if you have problems.
KenKen Game Instructions
| HOW TO PLAY. Review the table and each cell. Once you have identified the value of a cell, click in the cell and type your answer. If you get stuck, you can click the "gimme a hint" button. Continue answering to fill in the table. You can change an answer by clicking in the cell and deleting your old answer. If you mess up, you can click the "start over" button the clear the table |
When you are done, click the "check answers" button to see if you got it right. Click the "new game" button if you wanna play another game.
OBJECTIVE.
Each row can contain exactly one of each digit, with no repeats. Each column can contains exactly one of each digit, with no repeats
Each bold-outlined group of cells contains a clue with a number and symbol. The symbol represents the mathematical operation, and the number represents the result.
The math symbols used in this KenKen puzzle include:
+ = addition
- = subtraction
* = multiplication
/ = division
For example, if the clue for a group of 2 blocks is "7+", some possible answers could be 3+4 or 4+3.
STRATEGY. Some of the techniques from Sudoku can be used, but much of the process involves the listing of all possible options and eliminating the options one by one.
For example:
- A 3-grid bolded corner cell containing "3*" can only be 1,3,1
- A 3-grid bolded column cell containing "24*" can be 2,3,4 or 3,4,2, etc.
- A 2-grid bolded row cell containing "1-" can be 4,3 or 3,4 or 3,2, etc.
Enjoy!
 | FOR BEST RESULTS: KenKen is a lot of fun, but it is limited. To really improve your brain, join the Lumosity brain training service. I use Lumosity every day, and it works. |
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Game distributed by Google Inc. as a free Google Gadget. Used with Permission.
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