You have a set of 3 light switches outside a closed door.
Three light switches attic riddle.
There are three switches in the basement two of which are useless one is connected to a lightbulb in the attic.
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.
You can turn the switches on and off as many times as you wish they are all off to begin with but may only enter the room once.
November 17 2009 at 11 24 pm.
Go back downstairs and with each switch look to see what color of light is coming from the attic.
Left standard white middle yellow and right red.
One of them controls the incandescent light bulb inside the room.
You can go into the room one time only to see the light.
The door to the room is closed and there are no windows.
Inside is a single light bulb controlled by one of the three switches.
You must determine which needs saving and remove the other two.
Three switches puzzle you are in the basement of a house where there are are three identical on off switches.
After 5 minutes turn off switch s1 and turn on switch s2.
Check the remaining 2 light bulbs the one that is hot is controlled by switch s1.
There is no one there to help you.
Turn on switch s1.
How would you identify which switch corresponds to which light bulb if you are only allowed one trip upstairs.
You have no way to see into the attic or to see reflected light from the attic.
Immediately enter the room.
Switch on the first switch leave it for a minute and then switch it off again.
You need to determine which switch operates the bulb.
Then switch on the second switch and enter the room.
Let s name the switches s1 s2 and s3.
It s basically the same solution as our first idea.
One of them controls a lamp in the attic and two of them do nothing.
With the door closed from outside the room you can turn the light switches on or off as many times as you would like.
The light bulb that is on is controlled by switch s2.
You can turn the switches on and off and leave them in any position.
Answer to the riddle there are three switches downstairs.
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 will be connected to the light with the cold bulb.
Puzzle of the day 2059.
Each corresponds to one of the three light bulbs in the attic.
Mar 16 2017 this week s riddle is a favorite among many.
One light and three switches.
Riddle of the week 20.
There are three light switches outside a room.
Go up to the attic once with three different light bulbs and screw them into specific sockets.