Feel the two bulbs that are not lit.
Three switches outside a windowless room.
Switch on the first switch leave it for a minute and then switch it off again.
Each light is connected to one of three switches outside of the room.
How can you determine which switch is connected to which bulb if you are only allowed to enter the room once.
Three switches outside a windowless room are connected to three light bulbs inside the room.
Turn the first two switches on and leave them on for 2 minutes.
Switch on the first switch leave it for a minute and then switch it off again.
Each bulb is switched off at present.
You are outside the room and the door is closed.
The second switch will be connected to the light that is on the first switch will be connected to the light with the warm bulb and the third switch.
A windowless room contains three identical light fixtures each containing an identical light bulb or light globe.
The warmer of the two.
Then switch on the second switch and enter the room.