Puzzle supports arithmetic operations of addition, subtraction, division and multiplication. Calcudoku puzzles are great practice for deductive reasoning skills. Logic required to solve puzzle. 6x6 grid follows basic Sudoku rules: each row and column contain each number only once. Calcudoku puzzles have blocks surrounded by bold lines. Within each block, clues are given in the form of math operations. Numbers can occur more than once within each block.
Calcudoku puzzle is available as printable download and Google Apps™ version.