Just one. But he has to check it 100 times one for each watt.
Just two, but you're going to need a lot of patience and light bulbs.
Just one but he wants to do it thirty-two times and when he's done everyone thinks that his last lightbulb was much better.
The stone to throw the lights out, the flashlight to check if the lights are really out
Try it out on Internet Explorer
Why don't we have both
None, they all know someone that does it for them.
A vegetable soup
Because they added 486 and 100 on the first Pentium and got 585.999983605.
Watt-er