Most jokes involving mathematics or mathematicians are terrible. Below are some that I find somewhat amusing. Sorry.
Three logicians walk into a bar. The bartender says, 'Does everybody want a drink?'
The first logician says, "I don't know."
The second logician says, "I don't know"
The third logician says, "yes!"
My high school statistics teacher once told me I was average.
I told her she was mean.
What do you get when you cross an elephant with a grape?
Elephant grape sin(theta).
How do you make the number one disappear?
You add a "g" and it's gone.
Theorem: All positive integers are interesting.
Proof:
Assume the contrary. Then there is a lowest non-interesting positive integer. But, hey, that's pretty interesting! A contradiction.
Theorem: All positive integers are boring.
Proof:
Assume the contrary. Then there is a lowest non-boring positive integer. Who cares!