You are outside of a room with no windows and just one door. On the wall next to the door are three light switches. The only thing in the room is a single light bulb hanging from a flex.
Your job is to determine which light switch operates the bulb inside the room.
All the time the door is shut you can play around with the switches as much as you like.
But, once you open the door you cannot touch the switches again and you must make your decision.
The room is completely sealed and you cannot see inside without opening the door.
How do you work out which switch operates the light?
Your job is to determine which light switch operates the bulb inside the room.
All the time the door is shut you can play around with the switches as much as you like.
But, once you open the door you cannot touch the switches again and you must make your decision.
The room is completely sealed and you cannot see inside without opening the door.
How do you work out which switch operates the light?
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