How many tickles does it take to make an octopus laugh?
Ten tickles.
An chemist, a physicist, and a mathematician are stranded on an island when a can of food rolls ashore.
The chemist and the physicist come up with many ingenious ways to open the can. Then suddenly the mathematician gets a bright idea: "Assume we have a can opener..."
How many programmers does it take to change a light bulb?
None, that's a hardware problem.
Why were the Middle Ages called the Dark Ages?
Because there were too many knights.