Magic square

Making a magic square of $5×5$ : $Step 1$ Write all number till $5^{2}$ .

$Step 2$ Arrange them like this.

$Step 3$

$Step 4$ Place the pink one like this and do the same for other three corners.

$Step 5$ You are done !!

This will work for all odd numbered magic squares.

Now the sum, $= 3+9+15+8+14+7+13+19+12+18+11+17+23$ $= \boxed{169}$

You do not need to know how they are arranged in the magic square to know the answer. There is a formula to get the answer for any odd sided magic square alternate sum that include the central square, and that is [(m^2+1)/2]^2 for all odd m-sided magic squares. So for m=5, answer equal ((5^2+1)/2)^2 = ((25+1)/2)^2 = 13^2 = 169.