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     26 days ago  

    I solve it using Sets. The answer is 8. Thank you for taking me back to school when I use to do maths.

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    [-]
     27 days ago  

    I'd say 3

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    [-]
     27 days ago  

    Wrong

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      [-]
       27 days ago  

      Yes I am.
      Not sure if others followed the "quickly" instruction 😅

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        [-]
         25 days ago  

        My instinct says 3. But I haven't given it too much thought. Do you want speed or accuracy?

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        [-]
         27 days ago  

        30 - (15 + 12 - 5) = 8

        [-]
         27 days ago  

        guessing 30?

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