Answer to: Light Switch

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1. Turn on switches 2 and 3.
2. Wait 1 minute.
3. Turn off switch 2.
4. Go to room B.
   • If the bulb is on, switch 3 controls the lamp.
   • If the bulb is hot, switch 2 contorls the lamp.
   • If the bulb is cold, switch 1 controls the lamp.

Back to Light Switch.

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