A couple of fun limericks:

There was a young woman named Bright

Whose speed was much faster than light.

She set out one day

In a relative way,

And returned on the previous night.

There was a young chemist from Ryde,

Who drank a foul poison and died.

It was ortho-hydroxy-

para-methoxy-

tri-nitro benzaldehyde!

A woman in liquor production

Owns a still of exquisite construction.

The alcohol boils

Through magnetic coils.

She says that it’s “proof by induction.”

There are 10 kinds of people in this world.

• Those that know binary.
• Those that don’t.
• And those that didn’t expect this joke to be in base 3.

EDIT:

A statistician, a biologist, and a mathematician are sitting in a cafe watching the building across the street. 2 people enter the building. Some time later, 3 people come back out.

• The statistician says, “Our initial count must’ve been off.”
• The biologist replies, “I think they probably reproduced.”
• The mathematician observes, “Now if exactly one person enters the building it will be empty.”

Let Epsilon be so small that Epsilon half is already negative.

Someone asks “what’s up?”

Answer: “the cross-product of forward and left”

(the popularity of this joke in engineering school trained me to never ask “what’s up?”)