Puzzles & Games Boiling an Ostrich Egg - Solved

Discussion in 'Puzzles & Games' started by drlau, Nov 8, 2004.

  1. drlau

    drlau Premium Member

    You have two traditional hourglass-type egg timers. One takes 7 minutes for the sand to run through, and the other takes 11 minutes. You want to boil an ostrich egg for exactly 15 minutes. How can you do it?

    [Edited on 11-8-2004 by drlau]

    [Edited on 11-9-2004 by drlau]
  2. pineappleupsidedown

    pineappleupsidedown Premium Member

    Start both timers at the same time. When the seven minute timer runs out, put the egg into boiling water. Then, when the 11 min timer runs out, flip it over. When the 11 min timer runs out for a second time, the egg will be done. Thanks DrLau, i love rpoblems like this.

  3. drlau

    drlau Premium Member

    Good job! :up:

    There is more than one solution, however.

    Can you do it faster?
    Can you do it in just 15 minutes, total?

    I mean, you want to eat the perfectly boiled ostrich egg as soon as you can. You're hungry!

    [Edited on 11-8-2004 by drlau]
  4. oddtodd

    oddtodd Premium Member

    start them both at the same time . When 7 is done , flip it . When 11 is done , 7 will have 3 minutes left on top , and 4 on the bottom . Flip 7 again ?

    Add vinegar to the water to help peel ths shell from monster huevos .

    [Edited on 9-11-2004 by oddtodd]
  5. drlau

    drlau Premium Member

    <ed mcmahon voice>

    You are correct, sir!

    </ed mcmahon voice>

    Two egg-cellent (I could not suppress it - sorry!) solutions!

    Huevos rancheros for everyone!! :bouncy:

    [Edited on 11-9-2004 by drlau]