5 categories
Number Games
Digit-based puzzles to build arithmetic and logic skills.
Number Search
Hunt numbers in a grid
Word-search style puzzles using numbers instead of letters. Adjustable grid and difficulty.
Open generatorNumber Fill
Solve numeric sequences
Fill-in-the-missing-number puzzles based on patterns and arithmetic sequences.
Open generatorNumber Fill-In
Crossword-style number placement
Generate crossword-style number fill-in puzzles. The grid and digits are generated automatically — no input required. Includes full solutions.
Open generatorSudoku
Classic 9×9 logic puzzles
Generate Sudoku books with Easy, Medium, Hard, and Expert puzzles. Each puzzle has a unique solution.
Open generatorCalcudoku
Math + logic grid puzzles
Generate Calcudoku (a.k.a. Mathdoku) books. Each row and column contains the digits 1..N exactly once, and bold-outlined cages must reach a target using +, −, ×, or ÷.
Open generatorKakuro
Cross sums logic puzzles
Generate Kakuro (Cross Sums) books. Fill white cells with digits 1–9 so each run sums to its clue with no repeats. Mixed grid sizes, full solutions included.
Open generatorSudoku v2
Stylised 9×9 Sudoku
Classic 9×9 Sudoku built from band/stack permutations of a canonical solution. Each row, column, and 3×3 box contains the digits 1–9 exactly once.
Open generatorChaos Sudoku
Irregular-region Sudoku
9×9 Sudoku where the standard 3×3 boxes are replaced by nine irregular 9-cell regions. Rows, columns, and regions each contain 1–9 exactly once.
Open generatorNumber Puzzle
Quick arithmetic word problems
A printable list of bite-sized arithmetic word problems. Difficulty controls the number of questions and the magnitude of the operands.
Open generatorNumber Pyramid
Sum-pyramid puzzles
Each cell equals the sum of the two cells directly below it. Some values are hidden — work bottom-up or top-down to fill them in.
Open generator