4 Card Trick?

Discussion in 'Math' started by Hymie, Sep 7, 2018.

  1. Hymie

    Thread Starter Active Member

    Mar 30, 2018
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  2. BR-549

    AAC Fanatic!

    Sep 22, 2013
    4,010
    1,031
    Most math problems are not math problems. They are nuance problems.

    Always shady.
     
  3. WBahn

    Moderator

    Mar 31, 2012
    22,990
    6,883
    The '8' and the 'green' cards.

    The statement makes NO claim about the color on the opposite side of an odd numbered card, nor about the number on the opposite side of a blue colored card. Hence

    You need to turn over the '8' because if it's opposite side is NOT blue, then the claim is false.

    You also need to turn over the green card because if it's opposite side is an even number, then the claim is false.
     
    ErnieM likes this.
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