Three. One to hold the light bulb and two to spin the ladder.
They can't change anything
Trick question, anarchists can't change anything.
Just one but he wants to do it thirty-two times and when he's done everyone says that his last light bulb was much better.
Just one. But it takes about 8-10 visits.
Because she kept throwing out all the W's
They're both empty from the neck up.