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Weekend special - brain teaser

Discussion in 'Jukwaa la Elimu (Education Forum)' started by JF2050, Nov 6, 2011.

  1. J

    JF2050 JF-Expert Member

    #1
    Nov 6, 2011
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    Here is the brain teaser to warm up our minds as we are preparing for the week.

    You have an empty pool and you start filling it up. The volume of water doubles everyday. It will take you 100 days for the pool to be full, how many days will it take for the pool to be half full?


    Enjoy .
     
  2. Shoo Gap

    Shoo Gap JF-Expert Member

    #2
    Nov 7, 2011
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    99days
     
  3. J

    JF2050 JF-Expert Member

    #3
    Nov 7, 2011
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    You are right, Great!
     
  4. Vato

    Vato JF-Expert Member

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    Nov 7, 2011
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    Why 99 days?
     
  5. Shoo Gap

    Shoo Gap JF-Expert Member

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    Nov 7, 2011
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    You need only 1 day for the pool to double from half full to full, since to full the pool requires 100 days then to fill it half full need to subtract 1 day.
     
  6. J

    JF2050 JF-Expert Member

    #6
    Nov 8, 2011
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    Great!
     
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