Light the bulb: An everyday logic puzzle

Solution:

  1. Keep the first bulb (A, say) switched on for a few minutes. This will warm the bulb.
  2. Switch the first bulb off, switch another one (B, say) on, go outside to the room where bulbs are place by keeping this bulb (B) on.
  3. Where you reach to the bulbs, you’ll find that one bulb is lightened up while two others are switched off. Touch both switched-off bulbs and notice which one of them is warm. Using this method you find, bulb A & bulb B and their corresponding switches.
  4. Remaining one-switch must correspond to third bulb.

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