At least two, but they have to be pretty small to fit.
Just two, but more can join in if there's room in the lightbulb.
Find out next time on Dragon Ball Z***
Only one but he'll tell everybody.
Just two, how did they get in there anyway?
Because his number couldn't fit in their phones
They couldn't fit a deer into the car.
Well, turns out one is not enough, but if you pair it, two can.
Because Americans use imperial unit system.
The Martians