You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs? Hint-Brain teaser
Answers
Answered by
1
Answer:
Each bulb is switched off at present. You are outside the room, and the door is closed. Before opening the door you may play around with the light switches as many times as you like. But once you've opened the door, you may no longer touch a switch.
Answered by
0
1st bulb: switch it on, after few seconds turn it off.
2nd bulb: leave it switched on.
3rd bulb: do nothing.
open the door, observe, touch, see:
1st bulb: you must feel warm when you touch it.
2nd bulb: must be glowing as it's switched on.
3rd bulb: you gonna feel nothing, as it's left undone
Similar questions