In a “magic square”, the sum of the numbers in each row, in each column and along the diagonal is the same. Is this a magic square?
From the above question, we have:
Sum along the 1st row = +
+
=
Sum along the 2nd row = +
+
=
Sum along the 3rd row = +
+
=
Sum along the 1st column = +
+
=
Sum along the 2nd column = +
+
=
Sum along the 3rd column = +
+
=
Sum along the 1st diagonal = +
+
=
Sum along the 2nd diagonal = +
+
=
Therefore, sum of all the rows, columns and diagonals of this square are equal
Hence,
It is a magic square