Place the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 inside the 3×3 square grid (see the image below) in such a way that the sum of the numbers along any vertical, horizontal, or diagonal line is equal to 15.
Place the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 inside the 3×3 square grid (see the image below) in such a way that the sum of the numbers along any vertical, horizontal, or diagonal line is equal to 15.