Question

inside a room there is a bulb, the room is closed from outside there are three switches outside the room how can you say that which switch belongs to the Biltu inside the room, you can open the room only once

Answer 1

Hi JesiRoy!

so that was an interesting question sis!!

Well I think that first you should switch on the first switch for like two minutes then turn it off.
Then you need to turn on the middle one and run inside the room to see the effect it produces on the bulb. if the light is on it is the middle one, if it is off, then you need to feel the bulb and see if it's warm  or not. Definitely, the glowing of a bulb makes it warm right?!If the bulb is warm then the first one turns on the light, if not then the last one does. ..
Likewise you can first try the last switch and then move on to the first switch maybe or....!!
Sounds confusing huh?
Why not try out for yourself!!