Just one if it's Professor X.
They both have problems finding x.
The X-Men
I don't know...
More than three, I still can't reach it.
Zero. Homeless people don't screw in light bulbs they screw in cardboard boxes.
Seven. One to install the bulb and six to figure out what to do with the old one for the next 10,000 years
Professor + I'm sorry. lol.