40.3 Magic cube 1019
40.3 Magic cube........................
Label the vertices of a cube by the numbers 1, 2,...,8without repetition
such that the sum of the numbers at the four vertices of each face is a
constant.
5 4
3 6
2 7
8 1
3 6
5 4
2 7
8 1
2 7
5 4
3 6
8 1