Two, one to screw it in, and another to say "Sock it to Me." (Notes: Sock it = Socket. Also, for the infant readers among you, this was a popular catch-phrase from "Laugh In.")
Next Light bulb Joke
orView All Light bulb Jokes
One. He gives it to six Californians, thereby reducing the problem to an earlier joke...
In earlier work, Wiener [1] has shown that one mathematician can change a light bulb.
If k mathematicians can change a light bulb, and if one more simply watches them do it, then k+1 mathematicians will have changed the light bulb.
Therefore, by induction, for all n in the positive integers, n mathematicians can change a light bulb.
Bibliography:
[1] Wiener, Matthew P., <11485@ucbvax>, Re: YALBJ, 1986
Next Light bulb Joke
orView All Light bulb Jokes
Because E.T. eventually went home!
Next Trump Joke
orView All Trump Jokes
To give us some sort of appreciation for flutes.
Did you hear about that music composer who committed suicide? He didn't even leave a note.
Next Music Joke
orView All Music Jokes