KenKen

KenKenT is a mathematical and logical puzzle loosely similar to sudoku. It was invented by a Japanese mathematics teacher Tetsuya Miyamoto as an 'instruction-free' method of training the brain and was later published in The Times in March 2008.

The objective is to fill a grid in with the digits 1 through 6 such that:

Each row contains exactly one of each digit
Each column contains exactly one of each digit
Each bold-outlined group of cells contains digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication (x), and division (÷). Unlike Killer sudoku, digits may repeat within a group.

If you want to have a go you can find online puzzles at:-

Kenken Books

	The "Times": KenKen: The New Brain-training Puzzle Phenomenon Puzzle books by KenKen creator Tetsuya Miyamoto. Four books of puzzles available. From Amazon.co.uk and Play.com
	Will Shortz Presents the Little Gift Book of Kenken 250 logic puzzles that make you smarter from the godfather of Sudoku. From Amazon.co.uk and Amazon.com
	Will Shortz Presents Kenken 100 logic puzzles that make you smarter. From Amazon.co.uk and Amazon.com
	The "Times": Junior KenKen: Brain training for young minds by KenKen creator Tetsuya Miyamoto. From Amazon.co.uk and Play.com
	Will Shortz Presents I Can KenKen! KenKen helps children improve concentration, logic and arithmetic skills. Amazon.co.uk and Amazon.com

Sudoku 2009 - Calendars, Books and Gifts

Sudoku for Kids
You know how much fun Sudoku is, and kids love it too! Sudoku is not just fun, but is a effective way to develop logical thinking. Sudoku for Kids is a great new e-book with over 100 Sudoku puzzles for children.

Sudoku Quotes and Tips
It's not just a puzzle, it's a work of beauty.
Wayne Gould, Father of the current Sudoku craze.

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