A puzzle : Imagine you are standing in a room in a big house. You see three electric switches on the wall. You expect to see three lights. But the bulbs are not in this room. They are in another distant room. So you don't know which switch lights up which bulb in that room. You must find out which switch lights up which bulb by going into that distant room only once. How can you do this? You are not allowed to stay in this room for more than three minutes. (Hint: There is a stool in the other room.)
Can any one solve this??;)
if anyone will solve this I WILL MARK AS BRAINLIEST
Answers
Answer:
Before reading the answer can I interest you in a clue?
The consensus of opinion seems to be this is the best answer:
• Switch on switches 1 & 2, wait a moment and switch off number 2.
• Enter the room. Whichever bulb is on is wired to switch 1, whichever is off and hot is wired to switch number 2, and the third is wired to switch 3.
Obviously any combination would work. It doesn't have to be switches 1 & 2 you flick, any two will be fine, so long as you can remember which. There is another possible answer, this involves switching on 1, then waiting a while and switching on 2. When you get in to the room two of the bulbs will be on but one will be much hotter. It's valid, but there are several reasons why this is not as good. I have built below a sort of simulator. Have a play, it's obviously more of a test if you hide the Bulbs until you've finished messing with the switches!
Note: no information is sent to me, the simulation is done entirely locally, on your computer.
Show Answer Show/Hide Bulbs Reset Switches & Wires 3 Bulb Version/1 Bulb
a bulb switched on a bulb switched off a bulb just switched off
Alternative form with one bulb.
Another form of this puzzle sets up that you are renovating a building or something like that. There are three switches in the basement, two of which are useless, one is connected to a lightbulb in the attic. You must determine which needs saving and remove the other two. It's basically the same solution as our first idea. That is switch on 1&2, wait a minute, switch off two and go to the attic and check if the bulb is on, hot, or cold.
As I say this puzzle is unusual for this site in that it is not completely pure, it's pragmatic rather than pure logic. But it is a very common question and that earns it it's place
tumari siso to bohot cute hai ☺️