Just 1...blondes will screw anything.
5 1 to hold the bulb and 4 to spin the ladder.
A: Because they can spell it.
Californians don't screw in light bulbs, they screw in hot tubs and infinity pools.
Indeterminate
None if nobody's looking.
A: Nine........one to do it and eight others to wish they'd been asked.
3 in 1
1 figure, literally and figuratively.