Genius minds only - nma


Old 09-09-19, 03:35 PM
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Genius minds only - nma

Smart person only question. If youíre a cheater and have to look it up to respond, please donít ruin this question for the people that would like to figure it out.

Question: You have a building with 3 separate rooms inside a building with no windows. The doors are on the south side of the building, while three separate switches are located on the north side of the building on the outside. Each one of the rooms has a single incandescent 60 watt light bulb, which are in turn each connected individually to one of the three switches on the outside. You cannot see into the building in any way shape or form. You do not have Ex-Ray vision either. You cannot see into any of the rooms from any other room. Even at night, you cannot see into any room from another room, nor from the outside. And no, you donít have a helper. Youíre all by yourself on this one.

The problem: Youíre trying to figure out which switch goes to which lightbulb in which room. Youíre only able to go to each room once. You cannot go back to any of the rooms once you leave them. Once you leave the switches on the North side of the building, you cannot return to the switches until you know with a certainty that you can determine which switch goes to which room.

Please submit your your questions and answers below! Good Luck!
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Old 09-09-19, 04:49 PM
Join Date: Sep 2002
Location: welland ontario
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The key to it is incandescent lights. Won't work with LEDs.
Old 09-10-19, 06:44 AM
Join Date: Oct 2005
Location: USA
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that was a big clue for me. turn on one light for 30 minutes, then turn off. turn on a different switch, and keep it on. Leave 3rd switch off. enter each room, take notes. warm but off bulb belongs to the on then off switch. the cold bulb to the always off sw, and the on light to the on sw.

manytimes the led bases get warm too!
Old 09-16-19, 12:38 AM
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Very good fellas! I liked the first answer. You answered it without giving it away. Well done. And yes, itís a good clue. Now try & stump your friends that think theyíre so smart!

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