bulbs

[brian j john]

you are in a room with three switches in another room there are three bulbs each of the bulbs are worked by one of the switches you cannot see into the other room , how can you find out which switch operates which bulb . you may enter the other room only once

[avern]

(this is assuming you can tell if there is light coming from the the room with the bulbs)

Flip on two switches.

Go to room to see which bulb is off.

Unscrew one of the lit bulbs.

Go back and flip off one switch.

[brian j john]

sorry avern but you cannot see into nor see any light coming from the other room so your answer is incorrect

[davidicus]

this has to be done by touch. switch on left and right switch wait a while enter the room feel the bulbs for warmth/cold or something like that

[gco2005]

Turn on switch one.  Wait for five minutes. Turn off switch one.  Turn on switch two. Enter room.

The warm bulb is switch one.

The bulb on is switch two. ...and hence you you can deduce switch three

[Jude123]

Very clever brian. I'm no good at these sort of conundrums. Give me anagrams any day!