Prove that the central cell (the number in the middle cell) of any 3x3 magic square is always one-third the magic constant (the sum of any side, either 2 major diagonals, or either center row in the magic square).
Show that in any larger square (n x n), the central cell does not need to be 1/n the magic constant.
(In reply to re: Solution to part 1
It most certainly does not suffice.
If the problem said "Show that in ALL larger sqaures (nxn), the central cell does not need to be 1/n, the magic constant", then it would suffice. But the problem doesn't say that.
To address this issue, one must either:
- show that for ALL cases of (nxn) where n is odd and larger than
3, then the center square need not be 1/n x the magic constant, or
- refute part 2 by showing that there is a larger square where n is
odd and that the center actually MUST be 1/n x the magic constant