You Are In A Room With Three Light Switches

Only one does anything and it turns on the light downstairs.

You are in a room with three light switches. The bulb that is off and cold is controlled by switch 1. The door is closed and you cannot see if the light is on or off through the door. Leave switch 1 off. You are only allowed to go into the room once.

You may manipulate the switches as you wish but once you open the door you can t change them. You have a set of 3 light switches outside a closed door. With the door closed from outside the room you can turn the light switches on or off as many times as you would like. Turn on switch x for 5 to 10 minutes.

You re in a room with three light switches each of which controls one of three light bulbs in the next room. Each switch operates a different light bulb in the room. Turn switch 3 on. How can you find out which switches are connected to which.

Punishment for failure to solve this is having to listen to obama speak for an hour. Let the bulbs be x y and z. There is a room with a door closed and three light bulbs. Turn switch 2 on for five minutes and then turn it off.

You need to determine which switch controls which bulb. Before opening the door you may play around with the light switches as many times as you like. Determine which switch operates which bulb. This is a simple problem.

All lights are off to begin and you can t see into one room from the other. Identify each switch with its bulb. From here you can t see the light and it makes no sound. In front of you are three light switches.

However you know the light is off to start. Outside of the closet there are three light switches. You cannot see the whether the light is on or off from. If a bulb is on it s controlled by switch 3.

Each light is connected to one of three switches outside of the room. You can inspect the other room only once. You are allowed one and only one trip to the other room at which time you have to determine which switch controls which bulb. Outside the room there are three switches connected to the bulbs.

Feel the light bulbs for heat. The warm bulb is controlled by switch 2. There is another room down the hallway with 3 light bulbs all are incandescent light bulbs and each light bulb is operated by one of the switches in the hallway. You are standing outside a room next to three switches all of which are off.

Each bulb is switched off at present. One of them controls the light inside the room. It s really a stupid question though that says nothing. The three switches control three light bulbs in another room.

But once you ve opened the door you may no longer touch a switch. Call the switches 1 2 and 3. The room door is closed so you cannot see which switch operates which bulb. Do it the electrical engineering way and put a video camera in the room and wait 15 minutes before flipping each switch.

You can go into the room one time only to see the light.