Solution to 3 Light Bulbs Brain Teaser for kids
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Keep the first switch on for a few minutes.
The bulb in the other room gets warm, right?
Then switch it off, switch another one on, and walk into the room with the bulbs.
The first one you switched on, then turned off will be warm but off.
The current switch that is on controls the bulb lit up in the room.
The cold bulb goes to the third switch you never used.
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