Brain Game: Pop Quiz

If you haven't yet turned off your thinking organ for the summer, try today's Brain Game. We've offered a few number-series puzzles before, but this one may require a little lateral thinking (and, for some of you, a conversation with someone more over-the-hill).

What's the final number in this sequence?

6.5, 8, 10, 12, 16, ...

Click here for the answer.