One, but the light bulb has to *want* to be screwed in.
He wanted to grow mashed potatoes.
tummy, my X-Men!
It takes four. One to screw in the bulb, and three others to watch and say, "Really dude, you look huge!"
A: Nine........one to do it and eight others to wish they'd been asked.
Four. One to change the bulb and three to make a t-shirt about it.
It only takes two mice to screw in a light bulb. The hard part is getting them in there.
Because the 'p' is silent.
Because they are both surrounded by nuts.