Packaging the pentominoes
Imagine you want to package a precious and fragile set of pentominoes to be shipped to your Australian friend. You want to package them, like a truly polyformist will do, in such a way they don't touch each other. Which will be the minimal internal area of the box? Here are the solutions I found. I'm not sure they are minimal, but it seems impossible to use a box with area below 120 units.