Question

1) The Light Bulb Puzzle
On a wall are 3 switches that we can call A, B and C. Only one controls a light bulb inside a bathroom. The other two switches do nothing. You can only open the bathroom door
once to check the bulb and you can't touch the switches after that. How will you find out which switch controls the light bulb?

Hint: You could touch the bulb to see if it is warm or cold​

Answer 1

Answer:

Flip switch number 1 and wait a few minutes. Flip switch number 1 back to its original position, and then immediately flip switch number 2.

Open the door. If the light is on, then switch number 2 controls it. If the light is off, then go and feel the bulb with your hand. If the bulb is hot, the switch number 1 controls it, and if the bulb is cold, then switch number 3, the one you did not touch, controls it.