A friend of mine sent a trick question to me - one that I haven't heard in years, and thought I'd pass the fun on... 

Three frogs are sitting on a log.
One of them decide to jump off.
How many frogs are on the log?
Feel free to give your answers and how you came to that conclusion. On Monday night/Tuesday morning, I'll post the answer I gave (as well as my friend's) as a comment to this blog.