Brain teaser
Apr 3, 2023 07:56:36 #
You are in a room that has three switches labeled 1, 2, and 3. The switches control three light bulbs in the next room, on the other side of a closed door. Once you open the door, you may not touch the switches again. How can you definitively tell which switch controls each of the light bulbs?
Apr 3, 2023 08:33:23 #
Bigmike1
Loc: I am from Gaffney, S.C. but live in Utah.
Ain't got no idear. I would just switch on all three and have as much light as possible.
Apr 3, 2023 08:34:44 #
Cheese wrote:
You are in a room that has three switches labeled 1, 2, and 3. The switches control three light bulbs in the next room, on the other side of a closed door. Once you open the door, you may not touch the switches again. How can you definitively tell which switch controls each of the light bulbs?
Assuming incandescent bulbs. Flip one switch for 10 seconds and another for 30. Switch both off and go feel for cold warm and hot.
Apr 3, 2023 08:42:10 #
Apr 3, 2023 08:51:13 #
Tex-s wrote:
Assuming incandescent bulbs. Flip one switch for 10 seconds and another for 30. Switch both off and go feel for cold warm and hot.
Apr 3, 2023 22:15:35 #
Tex-s wrote:
Assuming incandescent bulbs. Flip one switch for 10 seconds and another for 30. Switch both off and go feel for cold warm and hot.
Well done. The more detailed answer:
Turn on switch 1 and 2
Wait 5 minutes
Turn off switch 2
Open door
Switch 1 controls the bulb that is lit
Switch 2 controls the bulb that is not lit, but is warm
Switch 3 controls the bulb that is cold
Apr 4, 2023 06:47:18 #
Cheese wrote:
Well done. The more detailed answer:
Turn on switch 1 and 2
Wait 5 minutes
Turn off switch 2
Open door
Switch 1 controls the bulb that is lit
Switch 2 controls the bulb that is not lit, but is warm
Switch 3 controls the bulb that is cold
Turn on switch 1 and 2
Wait 5 minutes
Turn off switch 2
Open door
Switch 1 controls the bulb that is lit
Switch 2 controls the bulb that is not lit, but is warm
Switch 3 controls the bulb that is cold
Apr 4, 2023 09:34:45 #
Cheese wrote:
Well done. The more detailed answer:
Turn on switch 1 and 2
Wait 5 minutes
Turn off switch 2
Open door
Switch 1 controls the bulb that is lit
Switch 2 controls the bulb that is not lit, but is warm
Switch 3 controls the bulb that is cold
Turn on switch 1 and 2
Wait 5 minutes
Turn off switch 2
Open door
Switch 1 controls the bulb that is lit
Switch 2 controls the bulb that is not lit, but is warm
Switch 3 controls the bulb that is cold
And the set director calls out for the staff to get the blanket for # 3 bulb before it freezes! (Easter ain't passed yet!)
Apr 4, 2023 10:38:56 #
ELNikkor wrote:
Open the door first...
Agree!! Use the old principle KISS.
Apr 4, 2023 11:18:35 #
Two of the important things I learned in kindergarten were that "F..." is a bad word and to never spit on a hot lightbulb.😜
Apr 4, 2023 11:36:31 #
Apr 4, 2023 14:50:59 #
Cheese wrote:
You are in a room that has three switches labeled 1, 2, and 3. The switches control three light bulbs in the next room, on the other side of a closed door. Once you open the door, you may not touch the switches again. How can you definitively tell which switch controls each of the light bulbs?
Assuming that all three bulbs are incandescent, I'd turn on switch number one, wait a few minutes and turn it off. Immediately turn on switch two and enter the room. Then I would feel the two lights not on. the warm light would be controlled by switch one, the lighted bulb would be controlled by switch two and the cool bulb controlled by switch three.
Apr 4, 2023 20:53:35 #
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