All of them actually. Two to hold the ladder and one to change the lightbulb.
Just two, but more can join in if there's room in the lightbulb.
Just one, but he'd have to watch Radiohead do it first.
A ladder.
One. They simply hold the bulb and wait for the world to revolve around them.
The Star Spangled Banner!
Two. One to change it and one to yell "Ta-daa!" when he's done.
None, broken lightbulbs have the rights to be treated as a normal lightbulb.
Pac Man-free Ver.
Thought of this one on my own while playing WoW a couple days ago and I'm pretty sure it hasn't been told before. I like corny jokes. I Googled it and didn't find anything (:
