Calcudoku

Calcudoku is one of the many names for a puzzle that combines more than just the addition regions familiar from killer sudoku, but also combines the other mathematical operations: that is: subtraction, multiplication and division. There is one other key rule change in calcudoku, in that you may repeat a number within a coloured region (the set of cells that make up each sum). However, you must not repeat in a row or column, as familiar from normal sudoku.

Play A Sample Calcudoku Killer

100 Calcudoku If you are logged in to your account, click the links below to play any of a 100 calcudoku puzzles; we hope you enjoy them!

Puzzle 1
Puzzle 2
Puzzle 3
Puzzle 4
Puzzle 5
Puzzle 6
Puzzle 7
Puzzle 8
Puzzle 9
Puzzle 10
Puzzle 11
Puzzle 12
Puzzle 13
Puzzle 14
Puzzle 15
Puzzle 16
Puzzle 17
Puzzle 18
Puzzle 19
Puzzle 20
Puzzle 21
Puzzle 22
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Puzzle 27
Puzzle 28
Puzzle 29
Puzzle 30
Puzzle 31
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Puzzle 37
Puzzle 38
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Puzzle 48
Puzzle 49
Puzzle 50
Puzzle 51
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Puzzle 53
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Puzzle 77
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Puzzle 86
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Puzzle 88
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Puzzle 90
Puzzle 91
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Puzzle 94
Puzzle 95
Puzzle 96
Puzzle 97
Puzzle 98
Puzzle 99
Puzzle 100

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Prefer to play on paper? Then check out the Book of Calcudoku Puzzles