We need to wrap up this cube-shaped present, remembering that we
can have no overlaps. What shapes can you find to use?
You want to make each of the 5 Platonic solids and colour the faces
so that, in every case, no two faces which meet along an edge have
the same colour.
In this problem you have to place four by four magic squares on the
faces of a cube so that along each edge of the cube the numbers