Q:
You are standing outside a closed room.
You can see three switches on the wall.
One of them corresponds to the bulb inside the room.
You can leave the switches in any position you want.
There is no way to see the light inside the room from outside.
If you are allowed to go inside the room only once,
How can you identify exactly the switch which controls the bulb inside?
Answer : Show Me
You are standing outside a closed room.
You can see three switches on the wall.
One of them corresponds to the bulb inside the room.
You can leave the switches in any position you want.
There is no way to see the light inside the room from outside.
If you are allowed to go inside the room only once,
How can you identify exactly the switch which controls the bulb inside?
Answer : Show Me
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