None. They can't climb the ladder.
None, that's what students are for.
To get to the other side!
A ladder.
17, 1 to hold the lightbulb, 1 to hold the ladder and the other 15 to drink whiskey until the roof spins
Two. One to put it in and one to complain that he never screws anything anymore.
Canteloupe
Because he was reaching for a galaxy far, far away.
None. People who glow in the dark don't need lightbulbs.
Queen Kong.
By scalene it