Basement Attic Light Switch Riddle

There are 3 switches downstairs each corresponding to one of the light bulbs upstairs.

Basement attic light switch riddle.

Switch 3 on 5 minutes then off. The light on is the second and the light off is the switch you didn t flip. I was thinking about the light switches. If you go upstairs to the attic you are not allowed to return to basement.

Turn on one switch for five minutes then turn it off. If you have 3 switches downstairs have a time delay of 5 minutes between each switch. One of them controls a lamp in the attic and two of them do nothing. 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. If insulation is packed too tightly around the light fixture it may be trapping heat around the light fixture canister causing the limit switch to overheat and shut down the light fixture. The door is closed and you cannot see if the light is on or off through the door. Go upstairs and touch the bulb.

You must determine which needs saving and remove the other two. You are in the basement of a house where there are are three identical on off switches. Compare the wattage on the light bulb with the rating printed on the light fixture. How can you figure out which light switch goes to which light bulb by only making 1 trip upstairs.

Then switch 1 would be the switch. You have no way to see into the attic or to see reflected light from the attic. All of them are turned off and their switches are installed downstairs. Switch 2 on 5 minutes then shut off.

The famous light bulb riddle. Flip a second switch and run up to the attic. Test your brain logic by trying to solve this real life situation riddle. You can play with the switches as much as you want and after that you can visit the attic above just once.

It s basically the same solution as our first idea. Install a lower wattage lightbulb if necessary. However you know the light is off to start. As long as you don t stop for a beer before running up the light that s off but warm to the touch is the first switch.

Switch 1 leave on 5 minutes then shut off. There are three light bulbs in your attic. How can you find out which switch to which bulb corresponds.