TRICK QUESTION. THEY CAN'T CHANGE ANYTHING.
Two. One to identify that the lightbulb has indeed burned out, and one to call the maintenence man to change the lightbulb.
Whatever it says in the book.
One, but it will take 13 attempts.
To get to the other side.
TRICK QUESTION. THEY CAN'T CHANGE ANYTHING**
Trick Question. They only think they can reach that high.