Kjartan shows how this magic square can produce the target number in at least 24 different ways. These include the 4 horizontal and 4 vertical lines, the two diagonals and the four corners.
- Any "target" number can be chosen for the square, but it's best between 20 and 50.
- The numbers in grey squares remain the same.
- The numbers in yellow squares are dependent on the "target number".
- x = (the target number - 20). Therefore if the target is 39, x = (39-20) = 19.
- Fill in x and also (x-1), (x+1) and (x+2) in the indicated places.
| 8 | 11 | x | 1 |
| x-1 | 2 | 7 | 12 |
| 3 | x+2 | 9 | 6 |
| 10 | 5 | 4 | x+1 |
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This completed square adds up to 39 in just about every way you can think of.
Look at the diagram below for help!
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| 8 | 11 | 19 | 1 |
| 18 | 2 | 7 | 12 |
| 3 | 21 | 9 | 6 |
| 10 | 5 | 4 | 20 |
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