Three Switches Puzzle Attic

You must determine which needs saving and remove the other two.

Three switches puzzle attic.

You can turn the switches on and off and leave them in any position. This will tell us that the switch which is in an off position corresponds to the light bulb that s off in the attic. The three switches downstairs in a house are three identical on off switches. Turn on switch x for 5 to 10 minutes.

One of the switches controls the lightbulb in the closet. Outside of the closet there are three light switches. 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. Each switch controls 1 of 3 light bulbs on the floor above.

And if we have 1 switch on and the other 2 off then we know which switch corresponds to the light bulb that s on. You may manipulate the switches as you wish but once you open the door you can t change them. How can you find the switch for each bulb with one inspection. Each corresponds to one of the three light bulbs in the attic.

Identify each switch with its bulb. You can flip the switches however you want but once you open the door you can no. You have no way to see into the attic or to see reflected light from the attic. There are three switches in the basement two of which are useless one is connected to a lightbulb in the attic.

Each corresponds to one of the three light bulbs in the attic. Open the door and touch the light bulb. You may move any of the switches but you may only go upstairs to inspect the bulbs one time. In your cellar there are three light switches in the off position.

One of them controls a lamp in the attic and two of them do nothing. The puzzle is to work out which switch controls the lamp. View notes reason puzzles from cs 704 at virtual university of pakistan. If we have 2 of the switches on then when we go into the attic 2 of the light bulbs will be on.

Let the bulbs be x y and z. It s basically the same solution as our first idea. Outside the room there are three switches connected to the bulbs. Puzzle of the day 2059.

One of them controls the lamp in the attic. Turn it off and turn on switch y.