Post:
You have three switches in one room and a single light bulb in another room. You are allowed to visit the room with the light bulb only once. How do you figure out which switch controls the bulb? Write your answer in the comments before looking at other answers.
Comment:
If this were an interview question, the correct response would be "Do you have any relevant questions for me? Because have a long list of things that more deserving of my precious time than to think about this!
This question becomes more a test of age as time goes. I've been asked this question even after the movement towards all-LEDs.
This question is also stupid, both because it has a correct question and because almost certainly some people have advantages over others that have nothing to do with the actual job.
20+ years ago? Sure, this was a somewhat viable question. But now? It's incredibly messy.
Over my years, I've asked dozens of very, very smart people from all kinds of walks of life, extremely smart to seemingly dumb as hell - nobody has ever gotten it right.
Probably the only thing this question is good for is seeing how an applicant does when faced with a diplomatic situation and a really dumb interviewer.
I'm super curious what the people who unironically ask this question think they're testing.