arrrgh! My brain!

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    Last post ago almost 2 years by Cat50
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      Mighty! Member
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      • Avatar 26589
        • Started by
          Mighty! Member
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        Thanks for this post from:

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        • 2d4818989f1ca7ccfaccc9b2527a6916
        Three guys go to a hotel.  The room is $30
        Each guy pays $10

        The manager tells the bellhop he forgot there was a room special.  The room should only be $25
        He gave the bellhop $5 one dollar bills to return to the guys.
        The bellhop doesn't want to calculate the breakdown so he gives each guy $1 back.

        So... The guys each end up paying $9 each.  $9x3 =$27
        Bellhop kept the extra $2

        $27 + $2 = $29

        Where is the extra dollar?
        8'| 8'|
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        • Flapjack
        Hmmm.

        They paid a total of $30 (3 x $10 each).

        The bellhop took away $5 x $1 bills.  So technically they paid $25.  He gives them $1 each - $25 + $3 = $28 plus he kept $2 makes $30.

        Doing it in "reverse" as such - yes I can see how it is $27 (3x$9) + $2 = $29.  I still can't work it out though doing it in reverse i.e. they paid $9 each and the bellhop kept $2.  Very tricky and thanks for the big brainteaser Gabby.



      • 2d4818989f1ca7ccfaccc9b2527a6916
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          admin
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        • last active 11 hrs ago
        There is no extra dollar but I can't understand why I can't get the same result by calculating it "in reverse" as  Blue says.
      • Lcbavatar3
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          Hero Member
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        • last active 7 hrs ago
        Tricky one.  from original $30 down to $25.  But the guys end up paying $9 each for a total of $27.
        $27 payments of the guy less the actual price of $25 equals the $2 taken by the bellhop.  Smart one, that bellhop   

        and Thanks for the analogy, blue 
      • Flapjack
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          admin
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        That's a great headcrusher.
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          Full Member
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        • last active 3 months ago
        Because you're not counting the 27th dollar as being spent.
      • Index
        • Replied by
          Super Hero
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        • last active 20 hrs ago
        gabby wrote:


        So... The guys each end up paying $9 each.  $9x3 =$27
        Bellhop kept the extra $2

        $27 + $2 = $29

        Where is the extra dollar?
        8'| 8'|


        Just some brainless math. They  paid $9 each for room AND bellhop's "tip". So why someone adds $2 tip AGAIN? It's already included in that $9. They should add $1 that everyone got back so $27+$1+$1+$1 = $30. Where is missing $0? 
      • Images
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          Superstar Member
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        Good one gabby  . I tried to work it out but i could not. I am anticipating the answer. I just love riddles  .

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