Number puzzle

Many years ago I was presented with an interesting puzzle. I did not solve it. I had to be told the answer. It is a very simple answer, but it isn't dumb. Figuring it out requires a significant leap of lateral thinking.

I figured I'd put it here for the amusement of others. Comments will be screened. I will eventually reveal the correct answer, but it may be a few months. :-) And now for the puzzle itself:

What is the next number in this sequence?

• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 20
• 22
• 24
• 31
• 100
• 121

Syndicated 2009-06-14 09:08:24 (Updated 2009-06-14 09:09:35) from Lover of Ideas