Calcudoku

Do Calcudoku puzzles in Firefox. Calcudoku is the best puzzle for exercising your logic reasoning and maths skills. Create an account and score points for solved puzzles! The puzzle is also known as Kenken, Mathdoku, Minuplu, and many other names. Calcudoku puzzles are similar to Sudoku, but much more varied and interesting: logic reasoning and simple (and hard!) arithmetic is required to solve a Calcudoku. They're entertaining to solve, and improve your IQ at the same time :-)