Replace the letters in the diagram with a different number from 0 to 9, such that the sum of the four numbers on all edges are the same, and the sum of the three numbers on all three corners are the same.

          A
        B   C
      D   E   F
    G   H   I   J

In other words, A+C+F+J = A+B+D+G = G+H+I+J and
A+B+C = D+G+H = F+I+J.

0
1 2
5 3
7 8

0,1,5,7 =13
0,2,3,8 =13

Posted by chris Knight on 2003-12-03 20:01:49