Speaking of tricky math I got this great illusion in an e-mail from my uncle today. I had to google to find a copy online since I can't forward e-mail to the forum. Wish I could. I get some crazy ones.
http://forum.xcitefun.net/is-it-twelve-or-thirteen-t6050.html
Count the people. Give it a minute for the people to move. Count them again.
Here's the solution:
http://www.defectiveyeti.com/archives/001258.html



Youth lives by personality, age lives by calculation. -- Aristotle on a calendar