A. Five!...Six!...Seven!...Eight!
Find out next time on Dragon Ball Z!
Twenty. 1 to hold the bulb 2 to turn the ladder and 17 to be on the guest list.
It's not >9000) FIND OUT NEXT TIME ON DRAGGGGON BAAAAL ZEEEEEEEEE
Just two, but you're going to need a lot of patience and light bulbs.
A. "One can read, one can write and one to keep an eye on the two intellectuals."
A. Three if you slice them very thinly.
A. A dentist lets you sit down while he hurts you.