Most imperial units are how they are because they can be easily divided into a bunch of different ways - 10 can only be divided by 5 and 2, 12 can be divided by

Most imperial units are how they are because they can be easily divided into a bunch of different ways - 10 can only be divided by 5 and 2, 12 can be divided by 2, 3, 4, and 6. This is practical when you have a physical amount something you need to deal with, like re-portioning a recipe.