Magic Square/Examples/Order 3

Definition
Order $3$ magic square:
 * $\begin{array}{|c|c|c|}

\hline 2 & 9 & 4 \\ \hline 7 & 5 & 3 \\ \hline 6 & 1 & 8 \\ \hline \end{array}$

Also see

 * Smallest Magic Square is of Order 3