Beach Day by Rodger Bliss
May 2024
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Thirsty Friends

Drinking-Offbeat
You have a large number of friends coming over and they all get thirsty. Your first friend asks for 1/2 a cup of water. Your second friend asks for 1/4 a cup of water. Your third friend asks for 1/8 a cup of water, etc.

How many cups of water do you need to serve your friends?

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6 guesses to Thirsty Friends


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  • brent

    Makes me wonder if they are really that thirsty!

  • Howard Lyon

    Infinitely less than 1 cup total

  • Luca

    Just one, for there would never be asked something that would make the total amount be over or even equal to 1

  • Crabman

    One cup. This is Zeno’s paradox. Starting with 1/2, the limit approached when adding an infinite number of successively halved fractions is 1.

  • Howard, you are today’s winner!
    Just one. If your friends kept asking for water like this forever one cup would be enough.

  • Katie

    However many cups there are friends. Who wants to drink from the same cup as somebody else? (although you really only need one)