You are standing in front of a room with 1 light bulb inside. You cannot see if it is on or off. Outside the room there are 3 switches in off position. You have to find out which switch controls the light bulb inside, but you get to enter the room only once. So how do you find out? this one only has 1 correct answer without cheating.

Uncategorized 1 Minute

“Hmm… I’d turn one switch on, leave it there for a good while, then turn it off and turn another one on. Then go inside the room and check the bulb. If it’s on, it’s the second switch. If it’s off, but the bulb is warm, it’s the first switch. If it’s off and cold, it’s the third, untouched switch.”

Unknown's avatar

Published by moonlightmaju

Published

Leave a comment