Puzzle Book Library

Mathdoku

Kenken-style math puzzles that make arithmetic fun

Site Structure

Browse Challenge Rooms

Enter from the main puzzle families, then drill into themed boards, variants, and printable sets.

Browse our full collection of 4x4 mathdoku puzzles — available in easy, medium, and hard difficulties, free to play onli…

Browse our full collection of 5x5 mathdoku puzzles — available in easy, medium, and hard difficulties, free to play onli…

Browse our full collection of 6x6 mathdoku puzzles — available in easy, medium, and hard difficulties, free to play onli…

Browse our full collection of 8x8 mathdoku puzzles — available in easy, medium, and hard difficulties, free to play onli…

Browse our full collection of 9x9 mathdoku puzzles — available in easy, medium, and hard difficulties, free to play onli…

Our addition mathdoku puzzles focus exclusively on addition cages, making them ideal for practicing arithmetic while enj…

Calcudoku is another name for the mathdoku / KenKen-style number puzzle — fill a grid so rows and columns have no repeat…

Our classic mathdoku puzzles mix all four operations (addition, subtraction, multiplication, division) just like the ori…

Our division mathdoku puzzles focus exclusively on division cages, making them ideal for practicing arithmetic while enj…

Our easy mathdoku collection offers puzzles perfectly calibrated for beginners and students — available across all grid…

Our hard mathdoku collection offers puzzles perfectly calibrated for advanced players and adults — available across all…

KenKen puzzles — also called mathdoku — challenge you to fill a grid with digits so each row and column is unique and ev…

Taxonomy

Each type routes to archive pages built for worksheets, puzzles, and printable practice content.