Calcudoku
A 6×6 number grid mixed with a little arithmetic.
The rules
- Use each number 1 to 6 exactly once in every row and every column.
- Thick outlines mark cages. The small label in a cage gives a target and an operation.
- The numbers in a cage must make the target with that operation: + add them, × multiply them, − the difference between two numbers, ÷ the larger divided by the smaller.
- A cage with just a number is a single square holding that number.
- A number may repeat inside a cage, as long as it isn’t in the same row or column.
How to play
- Tap a square, then tap a number. Use Notes for possibilities and Erase to clear.
- Clashing numbers turn orange, and a cage label turns orange when its cage is full but doesn’t add up.
Tip: fill single-square cages first, then two-square ÷ and − cages, which have the fewest options.
Solved! New puzzle at midnight.