"There are 10 types of people in this world. Those who understand binary and those who don't."

"An infinite number of mathematicians walk into a bar.
The first goes up to the bartender and says, "I'll have a pint of lager, please."
Each next one says, "and I'll have half of what he's having."
The bartender says, "You're all idiots," and pulls two pints. "