Will Shortz Presents Brain Training Kenken

"KenKen[registered]" is known around the world as a fun and wildly addictive game but did you know that it was originally created as a teaching tool to hone math, logic, and reasoning skills? So grab a pencil and enjoy this fun way to strengthen your mind! Refresh and renew the "little grey cells" with 100 easy to hard KenKen[registered] puzzles. Edited by legendary "New York Times" puzzle master Will Shortz. It features big grids with lots of space for easy solving.