How Strong Is A Piece of Paper?

We tested the strength of paper, folded in differently  shaped columns, by piling books on top. This is very similar to how columns are used to support buildings and other structures. We did this experiment three times and got three different results, although the cylinder always bore the weight of three to four times the amount of books as the cuboid or triangular prism. We had great fun trying out cylinders with different diameters