1. Joined
    19 Jan '06
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    27 Jan '06 18:36
    This is not original, but I thought it was pretty clever...

    You go into a house and there are three light switches on the first floor operating three lights on the second floor. You must figure out which switch corresponds to which light, but you can only go upstairs once. How do you do it?
  2. Joined
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    27 Jan '06 18:39
    Originally posted by Raindear
    This is not original, but I thought it was pretty clever...

    You go into a house and there are three light switches on the first floor operating three lights on the second floor. You must figure out which switch corresponds to which light, but you can only go upstairs once. How do you do it?
    ok. you flip two switches, wait a few minutes, and turn one off. Go upstairs. If the lightbulb is on, it is the switch you left on. If it is warm, it is the switch you turned off. If it is cold, it is the switch you did not flip.
  3. Joined
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    27 Jan '06 18:41
    Right, you are. (: That was quick.
  4. Joined
    24 Nov '05
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    27 Jan '06 20:10
    Originally posted by Raindear
    Right, you are. (: That was quick.
    it was easy...
  5. Subscribersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
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    27 Jan '06 20:141 edit
    Originally posted by ketch90
    it was easy...
    Ah, you didn't know they were flourescent lights? No heat.
    However, if you were fast enough, you could rush upstairs and see
    what light beams are closest to the lights....
  6. Joined
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    08 Feb '06 02:49
    Originally posted by sonhouse
    Ah, you didn't know they were flourescent lights? No heat.
    However, if you were fast enough, you could rush upstairs and see
    what light beams are closest to the lights....
    a light beam obviously moves at the speed of light so how would you move up stairs fast enough to see the ?
  7. Earth Prime
    Joined
    16 Mar '05
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    08 Feb '06 05:04
    Originally posted by Raindear
    This is not original, but I thought it was pretty clever...

    You go into a house and there are three light switches on the first floor operating three lights on the second floor. You must figure out which switch corresponds to which light, but you can only go upstairs once. How do you do it?
    You go up to the room and set up a sequence of mirrors down to where you stand.
  8. Standard memberTheMaster37
    Kupikupopo!
    Out of my mind
    Joined
    25 Oct '02
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    08 Feb '06 08:36
    Originally posted by Coconut
    You go up to the room and set up a sequence of mirrors down to where you stand.
    Or tie strings to the switches.
  9. Subscribersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
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    09 Feb '06 00:16
    Originally posted by sofar55
    a light beam obviously moves at the speed of light so how would you move up stairs fast enough to see the ?
    Well I said, IF you were fast enough. Remember, the light is
    coming towards you so maybe you could distinguish which beam
    is in front.
  10. The Great North
    Joined
    26 Nov '05
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    10 Feb '06 04:20
    Ooorrrr, you could use the phone beside you to call superman....I mean...yes, feel the lightbulbs...
  11. Belfast
    Joined
    27 Jan '06
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    12 Feb '06 11:17
    You could set up CCTV upstairs then go back down and watch what happens.
  12. Standard memberKirwan
    Mel Kirwan
    Hauxton
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    18 Feb '06 08:23
    I heard a puzzle the other day. No trickery - just mental maths. No paper or pencil allowed.

    If a man and a half dig a hole and a half in a day and a half how many holes does one man dig in a week
  13. Joined
    29 Apr '05
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    18 Feb '06 09:43
    since you can have half holes in this one i'd say the answer is 14/3 holes. oh and since it's a third of a hole and not half a hole, maybe its alright for the other thread too 🙂
  14. Joined
    27 Feb '06
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    28 Feb '06 20:40
    Originally posted by crazyblue
    since you can have half holes in this one i'd say the answer is 14/3 holes. oh and since it's a third of a hole and not half a hole, maybe its alright for the other thread too 🙂
    you can't have half a person nor "half" of a hole because that "half" is still considered a hole...
  15. Isle of Skye
    Joined
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    01 Mar '06 23:10
    Originally posted by Kirwan
    I heard a puzzle the other day. No trickery - just mental maths. No paper or pencil allowed.

    If a man and a half dig a hole and a half in a day and a half how many holes does one man dig in a week
    That would be 4 and two thirds holes.
    (Two thirds of a hole!!!!!! Half a man!!!!!!?)
    Neil.
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