Daily Calcudoku
One new 5 × 5 Calcudoku every day with all four operations, the same puzzle for everyone. It changes at midnight UTC.
How to play
- Fill the grid so every row and every column contains each number from 1 to 5 exactly once.
- The thick lines split the grid into cages. The small clue in the corner of each cage gives a target and an operation: the numbers in that cage must make the target using that operation.
- For − and ÷, start from the bigger number: a “2÷” cage could hold 3 and 6, in either order. A cage with no operation is just that number.
- Tap or click a square, then tap a number or type it. Turn on Notes to pencil in possibilities. Repeated numbers turn red, and so does a cage clue when its full cage misses the target.
What it practises
- Mental arithmetic with all four operations
- Logical reasoning
- A daily math habit
Level: Ages 9 and up
Tips for the daily Calcudoku
One puzzle a day is a quick way to keep multiplication and division facts sharp.
Your progress is saved, so you can start in the morning and finish later the same day.
Questions and answers
When does the daily Calcudoku change?
A new puzzle appears every day at midnight UTC.
Is the daily puzzle the same for everyone?
Yes. Everyone who plays on the same day gets the same puzzle, so you can compare times with friends or a class.
Can I play more than one a day?
Yes. The 4 × 4, 5 × 5 and 6 × 6 Calcudoku games make a new puzzle every time you press New puzzle.