"Exactly. Halving and doubling are really possible and practical tasks. If I gave you a pile of flour or a container of water and asked you to divide it into 8, this would be a lot easier than dividing it into 10."
So why doesn't a foot have 16 inches, or a yard 4 feet? Ok, ok, I know that 12 is a good number because it can be divided evenly in so many ways. But that's the whole system - an inconsistent mish-mash of multiples that confuses the heck out of most people. Then again, most people probably can't understand the metric system, either. Let's face it, most people just aren't that bright ;)
There were 12 Apostles. ;-)
SD