This was Posted by Jake Schonberger on August 3, 2010 on Mathematics 24×7
http://mathematics24x7.ning.com/
KenKen is a new math puzzle, and unlike Sudoku (very similar aesthetically), it employs arithmetic in addition to logic. KenKen was originally created by a Japanese math teacher, who needed a new way of engaging his students.
I have been working to promote the game, mostly to other teachers. KenKen.com has a great teacher program, which provides weekly puzzles to teachers for free throughout the academic year. There has been over 8,000 teachers signed up for this program.
I wonder if any of you have heard of KenKen, and if so, what kind of uses have you found it good for? It is an amazing way of keeping kids engaged.
Here is a picture of a 4×4 KenKen puzzle:
