[Guest]

2 puzzles

1. You have four columns and four rows. You can only use numbers 1 through 16. Using these numbers only once each, each column, each row and diagonal must equal 34.

2. You have five colums and five rows. You can only use numbers 1 through 25 once each and each column, row and diagonal must equal 65.

[Guest]

1. You have four columns and four rows. You can only use numbers 1 through 16. Using these numbers only once each, each column, each row and diagonal must equal 34.

7 2 16 9

3 12 6 13

10 5 11 8

14 15 1 4

[bonanova]

2. You have five colums and five rows. You can only use numbers 1 through 25 once each and each column, row and diagonal must equal 65.

| 12 1 20 9 23
| 10 24 13 2 16
| 3 17 6 25 14
| 21 15 4 18 7

| 19  8 22 11  5

[Guest]

I have a formula saved somewhere that lets you build magic squares like this to the Nth.

The highest I've actually built was 11 x11. Anyone wanna tackle 12 x 12? (so you'd use the numbers 1 - 144 and all columns and rows are equal sums.)