I have been fascinated for many years by the website of math professor and puzzle-maker Erich Friedman; I can still spend hours looking at the optimizations of

I have been fascinated for many years by the website of math professor and puzzle-maker Erich Friedman; I can still spend hours looking at the optimizations of interesting packing problems. http://www2.stetson.edu/~efriedma/packing.html http://www2.stetson.edu/~efriedma/packing.html