Excel in math, science, and engineering
A | B | C
D | E | F
G | H | I
In a magic square of order 3, what is the sum of the numbers at the corners of this square (labelled by the letters \(A, C, G, I\) as shown above)?
Note: This problem is part of the set Magic Squares Mania. The same question is asked for magic squares of order 4. To see it, click here.