Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

Bulbs


  • This topic is locked This topic is locked
257 replies to this topic

#51 danatural2005

danatural2005

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 12 July 2007 - 09:55 AM

you turn one on for ten minutes let it get warm then turn it off
turn the second one on
and dont touch the third one

now the first switch is the bulb that is off but warm
second one is on
third one is off and cold
  • 0

#52 mdsl

mdsl

    Junior Member

  • Members
  • PipPip
  • 51 posts

Posted 17 July 2007 - 05:41 PM

Why are so many people repeating the correct answer?

How many lives have LED room lights penetrated?
  • 0

#53 Bobblehead

Bobblehead

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 17 July 2007 - 07:58 PM

My solution was a little different, but quite similar I guess.

Turn on two switches, walk into the lightbulb room, the 'off' light is with the 'off' switch. Unscrew one of the two lightbulbs so it is no longer lit, go back to the switches and flip one of the 'on' switches to 'off', see if the light goes out in the other room or not and you've identified your 3 switches.

It would require being able to see light coming through the door from the other room - although it would work with LED bulbs.
  • 0

#54 Kalyan

Kalyan

    Newbie

  • Members
  • Pip
  • 4 posts

Posted 19 July 2007 - 01:10 PM

ON 1 Switch (Let it be for a minute or so)
Now Switch it OFF
Swicth ON 2 Switch

Go to the room where the bulbs are there.

The bulb that is not glowing and cool is for Switch 3
The bulb that is not glowing and warm is for Switch 1
The bulb that is glowing is for Switch 2
  • 0

#55 treetopwanderer

treetopwanderer

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 22 July 2007 - 03:57 PM

Turn on two switches
Wait a minute and turn one off.
Go to the other room. One light is on-the switch that you left on. One light is off but warm-the switch you switched off. One light is off-the switch you didn't touch
  • 0

#56 haisatya2004

haisatya2004

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 23 July 2007 - 12:29 PM

first on the switch for some time................
and off the first switch and on the second one

now go to the next room
the bulb which is on is the second switch
touch the other two bulbs...
then the bulb which is cool,is of third switch
and the other bulb which is somewhat hot is of first switch..
  • 0

#57 rhalpern

rhalpern

    Newbie

  • Members
  • Pip
  • 4 posts

Posted 23 July 2007 - 10:25 PM

Make a map of the switches.
Keep one switch off - label as "A"
Turn the second switch ("B") on for a few seconds, then turn off.
Turn and keep the third switch ("C") on.
Go to the next room.

The bulb that is off and cold belongs to switch A
The bulb that is off but warm belongs to switch B.
The bulb that is on belongs to switch C.
  • 0

#58 sheshercat

sheshercat

    Newbie

  • Members
  • Pip
  • 1 posts

Posted 24 July 2007 - 04:39 PM

i believe i figured it out. here is my solution.... You turn on one switch, leave it on for a few minutes, then turn it off. Immediately turn on one of the other switches and walk into the room. Now feel of the two bulbs that are not lit up and the one that is warm to the touch is the first switch you turned on and the one that is not warm is the last switch that was not turned on!
  • 0

#59 mdsl

mdsl

    Junior Member

  • Members
  • PipPip
  • 51 posts

Posted 24 July 2007 - 04:59 PM

I'm seriously curious why this puzzle, which has the solution included in the first post, compels so many people to create an account just to post their re-worded solution based on the same concept that a light can be on, off and cold or, off and hot.

Any ideas?
  • 0

#60 cjoshua_alba

cjoshua_alba

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 26 July 2007 - 01:50 AM

How can you tell it if it is now brownout?
  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users