Posers and Puzzles

Posers and Puzzles

  1. Joined
    20 Jul '07
    Moves
    475
    23 Jul '07 18:22
    How would you cook an egg in exactly 15 minutes when you didn't have a watch, clock, or timer, but only a 11 minute hour glass and a 7 minute hourglass. It is possible to do this in two turns, not including starting the timers.
  2. Standard memberPBE6
    Bananarama
    False berry
    Joined
    14 Feb '04
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    28719
    23 Jul '07 19:16
    Originally posted by mossman05
    How would you cook an egg in exactly 15 minutes when you didn't have a watch, clock, or timer, but only a 11 minute hour glass and a 7 minute hourglass. It is possible to do this in two turns, not including starting the timers.
    Turn over both hourglasses to start. When the 7-minute glass runs out, there will be 4 minutes left in the 11-minute glass. Turn the 11-minute glass over and start cooking the egg, and then turn it over again once the 4 minutes have run out. The total cooking time will be 15 minutes, and the total time will be 22 minutes.
  3. Standard memberuzless
    The So Fist
    Voice of Reason
    Joined
    28 Mar '06
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    9908
    23 Jul '07 19:242 edits
    Originally posted by PBE6
    Turn over both hourglasses to start. When the 7-minute glass runs out, there will be 4 minutes left in the 11-minute glass. Turn the 11-minute glass over and start cooking the egg, and then turn it over again once the 4 minutes have run out. The total cooking time will be 15 minutes, and the total time will be 22 minutes.
    turn both glasses over...start the egg. When the 7 minute glass runs out turn the 7 minute glass over. when the 11 minute runs out, turn the 7 minute back over. When the 7 minute runs out, eat your egg..

    7+4+4=15

    you get to eat your egg 7 minutes sooner than pB6's 😉
  4. Standard memberPalynka
    Upward Spiral
    Halfway
    Joined
    02 Aug '04
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    8702
    23 Jul '07 19:271 edit
    Originally posted by uzless
    turn both glasses over...start the egg. When the 7 minute glass runs out turn it over. when the 11 minute runs out, turn the 7 minute back over. When the 7 minute runs out, eat your egg..

    7+4+4=15

    you get to eat your egg 7 minutes sooner than pB6's 😉
    EDited out.
  5. Joined
    20 Jul '07
    Moves
    475
    23 Jul '07 19:44
    yeah, both PBE6 and uzless are right
  6. Joined
    16 Jul '07
    Moves
    102026
    24 Jul '07 20:41
    I prefer my eggs scrambled.
  7. SubscriberSuzianne
    Misfit Queen
    Isle of Misfit Toys
    Joined
    08 Aug '03
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    36014
    01 Aug '07 06:32
    Originally posted by mossman05
    How would you cook an egg in exactly 15 minutes when you didn't have a watch, clock, or timer, but only a 11 minute hour glass and a 7 minute hourglass. It is possible to do this in two turns, not including starting the timers.
    Why in hell would you cook an egg for 15 minutes when it's done after three?
  8. Standard memberwolfgang59
    Mr. Wolf
    at home
    Joined
    09 Jun '07
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    46357
    01 Aug '07 07:59
    Depends where the egg came from and what temperature the water is.

    Ostrich eggs take up to an hour to soft boil.

    For the BBC Chef Competition 'The Great British Menu' top chef Sat Bains cooked his duck eggs for something like 6 hours!! (The water was kept at a constant 30 Centigrade)
  9. SubscriberSuzianne
    Misfit Queen
    Isle of Misfit Toys
    Joined
    08 Aug '03
    Moves
    36014
    02 Aug '07 21:29
    Originally posted by wolfgang59
    Depends where the egg came from and what temperature the water is.

    Ostrich eggs take up to an hour to soft boil.

    For the BBC Chef Competition 'The Great British Menu' top chef Sat Bains cooked his duck eggs for something like 6 hours!! (The water was kept at a constant 30 Centigrade)
    Hmmm, good point.

    30C?

    That's barely above room temperature, isn't it?
  10. Standard memberwolfgang59
    Mr. Wolf
    at home
    Joined
    09 Jun '07
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    46357
    03 Aug '07 06:45
    86F .. maybe it was a bit warmer and maybe even longer. It was certainly abizarre way to boil ann egg - and they were still really soft when they came out.

    Must have tasted delicious tho cos the dish won the competition for best starter and was served to the French President at the British Embassy in Paris.
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