Briefly

An antimagic square

An antimagic square

In a magic square, the arrangement of numbers is such that the sum of all rows, columns and diagonals is always the same number.

On this occasion, the problem consists in create an “antimagic” square using all digits 1 through 9 so that the sum of all rows, columns and diagonals are different numbers.

Solution

Here are two possible solutions. The rest can be obtained by rotating or inverting these:

9 8 7
2 1 6
3 4 5
1 2 3
8 9 4
7 6 5