the correct solution is in the very first post ... and in hundreds of posts after it
Don't know if this solution is already posted before...
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Posted 27 February 2008 - 09:05 AM
Posted 29 February 2008 - 09:20 PM
Posted 01 March 2008 - 09:07 PM
Posted 05 March 2008 - 04:20 AM
Posted 06 March 2008 - 05:58 PM
Posted 07 March 2008 - 01:36 AM
turn on 1
wait ten min
turn off 1 and turn on 2
if bulb is hot, it's 1
if on, its 2
if off and cold, it's 3
Posted 09 March 2008 - 08:14 AM
Switch 1: ON: Leave ON for 10 minutes: OFF
Switch 2: ON
Go to room with bulbs
1 bulb will be glowing: This is linked to Switch 2
Check which bulb is hot: This is linked to Switch 1
Check which bulb is cold: This is linked to Switch 3
Posted 11 March 2008 - 08:02 AM
2)Switch 2(leave on)
3)Do not touch switch.
walk into Room if bulb is on it's switch 2 if it's off and hot to touch then it's switch 1 if it's not hot switch 3
Posted 13 March 2008 - 03:03 AM
turn one on for a while. Then turn it off turn another one on. Enter the room see which one is hot. then there is one on and one cool.
Bulbs - Back to the Logic Puzzles
This is one of my favorite logic puzzles (Edit: it is more a practical than a logic puzzle).
Imagine you are in a room with 3 switches. In an adjacent room there are 3 bulbs (Edit: let's say in lamps which are on a regular table) - all are off at the moment, each switch belongs to one bulb. It is impossible to see from one room to another. How can you find out which switch belongs to which bulb, if you may enter the room with the bulbs only once?
Edit: No help from anybody else is allowed.
Edit: Find out which switch belongs to which bulb - identify all 3 switches (so find out what bulbs are switches 1, 2 and 3 connected to)
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