Magic Square — Arrange Numbers to Equal Sum
Arrange 1-9 in a 3x3 grid so every row, column and diagonal sums to 15.
How to play
- Click a number (1–9) in the bank to select it, then click an empty grid cell to place it.
- Click an occupied cell to remove a number back to the bank.
- Every row, column, and both diagonals must sum to exactly 15.
- The hint panel on the right shows running sums as you fill the grid.
- Click 'Check' once all 9 cells are filled.
Place the numbers 1 through 9 in a 3x3 grid so that every row, column, and diagonal adds up to exactly 15. Click a number from the bank, then click a cell to place it.
Frequently asked questions
- What is a magic square?
- A magic square has numbers arranged so every row, column, and diagonal sums to the same value — in this 3x3 case, that's 15.
- Is there more than one solution?
- For a 3x3 magic square using 1–9, there are 8 solutions (rotations and reflections of the same pattern).