The only time it's not odd is in the case of number '2'. All even numbers from that point on can be divided by 2.
Well, a good example of this is the Latter Day Saint, or "Mormon," church. Their growth is exponential because they harbor different teachings from other religions and many people find this appealing. I guess what I'm trying to say is, different Christian churches have very different doctrine.
Measurements. Just because a particular result lies far from the mean doesn't make it any different. If it's noticeably far from the "crowd" of all the other measurements, it can be called an outlier. An outlier isn't necessarily bad, just different. It should be examined in detail to see if there's something odd about it, but not discarded out of hand.