Train your brain with fun number puzzles!
In a 4×4 puzzle, each row must contain the numbers 1, 2, 3, and 4 — each exactly once!
Each column must also contain all numbers exactly once. No repeats!
The grid is divided into boxes. Each box must contain all numbers exactly once too!
Try to complete the puzzle below in your head!
| 3 | 1 | ? | 4 |
| 2 | 4 | 1 | 3 |
| 1 | 2 | 4 | 2 |
| 4 | 3 | 2 | 1 |
The highlighted cell ? = 2 (row needs 2, column needs 2, box needs 2!)
Click the ✏️ Notes button to write small possible numbers in a cell while you think. Click again to turn off notes mode and enter your final answer.
If you place a wrong number, it turns red. Use Undo to remove it and try again!