The numbers 1 through 9 are arranged in a 3 x 3 grid so that each number is in the grid exactly once. They are arranged such that the top row plus the middle row gives the bottom row. If the grid forms another such addition when it is rotated 90 degrees to the left, what is its composition?

(Note: The numbers don't flip, for example 6 doesn't turn into 9.)

(In reply to second part full solution by pcbouhid)

Since in all possibilities (E+F) is greater than 10, I must have (B+C+1) = A, then I must eliminate that two possibilities I found where (B+C) = A, remaining only the two solutions shown "right".

Posted by pcbouhid on 2005-08-13 14:03:18