How to play
Fill an n×n grid with the digits 1 to n so that no digit repeats in any row or column. The grid is split into cages with thick borders. The number in a cage’s corner is its target, and the sign tells you how to reach it:
- +: the digits add up to the target.
- ×: the digits multiply to the target.
- −: the bigger digit minus the smaller one gives the target (two-cell cages).
- ÷: the bigger digit divided by the smaller one gives the target (two-cell cages).
A digit may repeat inside a cage, as long as the copies are not in the same row or column. Single-cell cages are filled in for you.
Every calcudoku on PuzzleSheets has exactly one solution, checked by a solver, and you can always reach it by logic.
Sizes and difficulty
Pick a size from 4×4 (great for beginners and kids) to 9×9. Difficulty then sets the cages and the operations:
- Easy: small cages with + and − only.
- Medium: adds ×, with bigger cages, and from 5×5 up you will need pairs (two cells sharing the same two candidates).
- Hard: adds ÷ and larger cages.
- Expert: the largest cages, of three to five cells, where pairs and sometimes triples are needed.
Tips
- Start with the small cages. “2÷” in a 6×6 can only be 1–2, 2–4 or 3–6. “5+” in two cells is 1–4 or 2–3.
- Look for forced pairs. If two cells in a row can only be 3 and 5, no other cell in that row can be 3 or 5.
- Use the row and column totals. In a 6×6, each row adds up to 21 and multiplies to 720.
- Write notes. Pencil in the possible digits and cross them off as the grid fills.
Using the player
- Tap a cell, then a number. Use Notes for pencil marks.
- Highlight conflicts shows repeated digits and full cages that miss their target.
- Your progress is saved on this device. Save code / Continue later lets you carry on elsewhere.
Printing
Print 1, 2 or 4 puzzles per page on A4 or US Letter, with an optional answer key.