MAGIC SQUARE (MODERATELY DIFFICULT)
Place a number from 1 to 9 in each empty cell of this square so that each row, each column and both main diagonals add up to the same sum. (You must determine this sum.) The same number can appear more than once.
Place a number from 1 to 9 in each empty cell of this square so that each row, each column and both main diagonals add up to the same sum. (You must determine this sum.) The same number can appear more than once.