KenKen®
KenKen® : Multiplication and Division

KenKen problems are free but require registration. If you do not
have a Math Forum login, please sign up now.

3x3 easy
4x4 easy medium hard
5x5 easy medium hard
6x6 easy medium hard
7x7 easy medium
8x8 easy medium
9x9 easy medium

Choose a grid size and difficulty level. There are ten puzzles of each kind.

© 2012 Drexel University. All Rights Reserved. http://mathforum.org/pows/