The question
Arrange numbers 1 through 9 in a 3x3 square so that every row, column, and diagonal sums to the same total. You can rotate the square to find symmetries.
Brain teasers
Fill the Grid
A magic square tests that every direction stays balanced.
Hints
Give 5 the center. Then balance the high and low numbers opposite each other.
Answer
One classic solution is:
8 1 6
3 5 7
4 9 2
Every row, column, and diagonal adds to 15. The symmetry lets you rotate or reflect the square and still keep the
same sums.