KenKen vs. Sudoko
The craze over Sudoko is wellestablished, as mentioned in a news note four years ago.
Now, one of my students, B.M. (Bellingham, WA), sent me an link with this note: "The other day my roommate was playing this game on his computer. It has some of the principles of of Sudoku, but it involves some more computation. I thought you might like it."
The game is KenKen. Invented in 2004 by Tetsuya Miyamoto, a Japanese mathematics teacher, KenKen has these rules:
 For a n x n puzzle, fill in with the numbers 1n
 Numbers can not be repeated in a row or column
 In each heavilyoutlined set of squares (i.e. cages), the numbers (in any order) must computationally produce the target number in top corner of cage using given math operation
 Fillin singlebox cages with target number
 A number can be repeated within a cage as long as it is not in the same row or column
So, start playing KenKen online...or by a book...or download it on your cellphone, etc. And, use it in your classroom, as it will give students of any age some practice with their computations.
