this post was submitted on 25 Dec 2025
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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!

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[โ€“] GreenKnight23@lemmy.world 16 points 10 hours ago (1 children)

if asked this I would go into a complicated explanation of how I would dismantle the switches to identify if they were functioning first because of sub-par outsourced manufacturing standards.

they'd probably attempt to move on to a different question, but I would always bring it back to those shoddy light switches.

"so do you have any questions for us?"

yeah, do you know who the manufacturer of the light switches are? it's probably Leviton, but I'm hoping it's Honeywell because they're far superior in quality. you see Leviton uses brass plated contacts vs Honeywell uses full brass fittings that don't cause resistance and increases the potential for fires. are you aware that using one brand over another could reduce your insurance costs by up to 3%?

[โ€“] yermaw@sh.itjust.works 5 points 9 hours ago

You've had some cowboys in here