Place the digits 1 through 9 in a 3×3 grid so that every row, column, and diagonal sums to the same number. What is that magic constant, and what does the completed square look like?
You arrange the numbers 1 through 16 in a 4×4 magic square (every row, column, and diagonal sums to the same value). What is that magic constant?
For an n×n magic square containing the numbers 1 through n², what is the formula for the magic constant (the common row, column, and diagonal sum)?