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Obelix@feddit.org to Technology@lemmy.worldEnglish · 2 months ago

A fake Facebook event disguised as a math problem has been one of its top posts for 6 months

www.engadget.com

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A fake Facebook event disguised as a math problem has been one of its top posts for 6 months

www.engadget.com

Obelix@feddit.org to Technology@lemmy.worldEnglish · 2 months ago
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A nearly year-old Facebook event for a "simple maths competition" has been one of the most viral posts on the platform for six months.
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  • manuc66@programming.dev
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    2 months ago

    ÷ could be a minus sign, see: https://en.wikipedia.org/wiki/Division_sign?wprov=sfla1

    • Venator@lemmy.nz
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      2 months ago

      Except that it has English text above it…

    • 💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱@programming.dev
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      1 month ago

      ÷ could be a minus sign

      No it couldn’t.

      https://en.wikipedia.org/wiki/Division_sign?wprov=sfla1

      Did you check the reference? It says % can be used as a minus sign, not the obelus. Welcome to what happens when you’re next-door neighbour Joe Blow can edit Wikipedia.

      • manuc66@programming.dev
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        26 days ago

        Yes I did, on page 243:

        It was employed in the Philosophical Transactions by the Dutch astronomer N. Cruquius; ÷ is found in Hübsch and Crusius. It was used very frequently as the symbol for subtraction and ``minus´´ in the Maandelykse Mathematische Liefbebbery, Purmerende (1754-69)

        • 💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱@programming.dev
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          17 days ago

          Maandelykse Mathematische Liefbebbery, Purmerende (1754-69)

          You know the Facebook post is in English and from 2025, right? 😂

  • billwashere@lemmy.world
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    2 months ago

    So order of operations is hard?

    • HereIAm@lemmy.world
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      2 months ago

      The issue normally with these “trick” questions is the ambiguous nature of that division sign (not so much a problem here) or people not knowing to just go left to right when all operators are of the same priority. A common mistake is to think division is prioritised above multiplication, when it actually has the same priority. Someone should have included some parenthesis in PEDMAS aka. PE(DM)(AS) 😄

      • 💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱@programming.dev
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        17 days ago

        The issue normally with these “trick” questions

        There’s no “trick” - it’s a straight-out test of Maths knowledge.

        the ambiguous nature of that division sign

        Nothing ambiguous about it. The Term on the left divided by the Term on the right.

        A common mistake is to think division is prioritised above multiplication

        It’s not a mistake. You can do them in any order you want.

        when it actually has the same priority

        Which means you can do them in any order

  • frezik@midwest.social
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    2 months ago

    Every one of these only makes me say “wouldn’t it be great if we did everything with RPN”?

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