Can you find a tetrahedron T contained inside a tetrahedron W such that the sum of the lengths of the edges of T is bigger than the sum of the lengths of the edges of W?
Source: Crux Mathematicorum, December 1996, proposed by "Proof."
[The problem name (my fault) refers to Prince Rupert's cube. -Jeff]
© Copyright 1997 Stan Wagon. Reproduced with permission.