Many hands make light work.
Three. One to change it while the other two argue about how old the old one is.
None, they will keep worshipping in dark.
Only one but they'll insist on going through about 5 bulbs before they find one that suits this particular room and situation.
None, because they keep on asking why all of the other light bulbs in the house aren't being changed at the same time.
The Army.
Irish handcuffs.
I say, "5-7-8-3" because they don't care how I am & saying my ATM Code out loud helps me memorize it.
It does not help to imagine people in their underwear.
Because Papyrus drinks plenty of milk.
One with plenty of body in it.
A: Thousands because Confucious say many hands make light work.