Place
the numbers one through nine in the 3 x 3 square array so that each row
(horizontal), column (vertical), and diagonal equals the same sum.
We
aren’t telling you what the sum is, but we have placed three of the
numbers for a little hint.
After
you solve this, if you want to try something harder, try a 4 x 4 square
with number one through sixteen, or a 5 x 5 square.
For
something a little different, try the magic triangle somewhere else on
the wall.