What's in Common With Numbers?

In western culture, numbers are very important. Sometimes we have milestones that involve numbersso for example, the enfe e super boll 50. The word five comes from fist, which is like a men five fingers in one hand. And then if you count groups of tens in fives and tens, and you start to get hundreds and fifties and so on. It could be why we are so prone to gather things in groups of tens or groups of five.