Try to rearrange the numbers in the right order!
3 x 3: 9 squares, 8 moves, rearrange the numbers from 1 to 9.
5 x 5: 25 squares, 18 moves, rearrange the numbers from 1 to 25.
7 x 7: 49 squares, 32 moves, rearrange the numbers from 1 to 49.
9 x 9: 81 squares, 58 moves, rearrange the numbers from 1 to 81.