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Gabe Bell@lemmy.world to tumblr@lemmy.worldEnglish · 4 days ago

TIL something that is mind blowing yet totally useless

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TIL something that is mind blowing yet totally useless

lemmy.world

Gabe Bell@lemmy.world to tumblr@lemmy.worldEnglish · 4 days ago
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  • TheGalidor@feddit.org
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    3 days ago

    Equivalently, (20+25)^2 = 2025

    • Gabe Bell@lemmy.worldOP
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      3 days ago

      Well now you are just screwing with my head for fun.

  • chellewalker@lemmy.ca
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    4 days ago

    Dang, I just spontaneously lost my lunch money reading this.

    • tetris11@feddit.uk
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      4 days ago

      I will take your box lunch, cube each item within it, and repack it to fit into like 2 lunchboxes. No consent required

  • StrongHorseWeakNeigh@piefed.social
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    4 days ago

    If you go looking, most numbers have some kind of interesting property like this.

    • tetris11@feddit.uk
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      4 days ago

      11 is the only 2-digit number that does not scare itself when looking in a mirror

      • morphballganon@lemmynsfw.com
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        4 days ago

        88?

        • SnortsGarlicPowder@lemmy.zip
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          4 days ago

          88 is self concious about how it has let itself go.

        • tetris11@feddit.uk
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          4 days ago

          what are these strange characters

    • WhiskyTangoFoxtrot@lemmy.world
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      4 days ago

      Except for 12407.

      • Ech@lemmy.ca
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        4 days ago

        Being the only non-interesting thing is pretty interesting.

      • GreatRam@lemmy.world
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        3 days ago

        1+2+4+0=7

      • zloubida@sh.itjust.works
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        4 days ago

        Yeah fuck 12407.

        • Klear@lemmy.world
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          4 days ago

          All my homies hate 12407

          • altphoto@lemmy.today
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            4 days ago

            I hate 13407 too, but 12407 is a special kind of wrong that cannot be righted.

    • driving_crooner@lemmy.eco.br
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      4 days ago

      Everytime I find a number related to someone I run it in wolfram alpha to check if its have something interesting. Like our professional registration number, my exboss has 3^7 and mine is prime.

  • 🇰 🌀 🇱 🇦 🇳 🇦 🇰 🇮 @pawb.social
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    3 days ago

    The last one was in 1936

    Oh shit… 2116 is gonna suck. This math is proof of a curse.

    • eskimofry@lemmy.world
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      well all that good luck was spent on aligning all the math bullshit, so not surprising.

      • 🇰 🌀 🇱 🇦 🇳 🇦 🇰 🇮 @pawb.social
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        When you put it that way, I am now worried about the fate of the planet itself (even if humans are already gone) when all the planets align on a year that is square. Might just mean the end of the world entirely.

  • danc4498@lemmy.world
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    4 days ago

    What a shame it will only last a year. Enjoy it while you can number nerds!

  • SuperSpruce@lemmy.zip
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    4 days ago

    Is this a general rule? Because with my primitive checking, all sum of first n cubes add to the square of a triangle number.

    1^2 = 1^3 = 1

    (1+2)^2 = 1^3 + 2^3 = 9

    (1+2+3)^2 = 1^3 + 2^3 + 3^3 = 36

    …

    • pruwyben@discuss.tchncs.de
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      3 days ago

      Huh, looks like it’s true!

      https://blog.keithmcnulty.org/a-fascinating-fact-about-the-sum-of-cubes-48647c40d852

      • Opisek@lemmy.world
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        3 days ago

        Paywall. But I did prove it myself for fun and it is indeed true :D

    • Alfredolin@sopuli.xyz
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      3 days ago

      Next one is not.

      • itslilith@lemmy.blahaj.zone
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        3 days ago

        Yeah it is, (1+2+3+4)² = 10² = 100 = 1+8+27+64 = 1³+2³+3³+4³

  • NigelFrobisher@aussie.zone
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    3 days ago

    I remember when I was supposed to be impressed that it was 11:11:11 on 11/11 11 as long as you just ignore the great big 20 in the year.

    • Druid@lemmy.zip
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      3 days ago

      I remember 11/11 back in 1111 - those were the days!

      • NigelFrobisher@aussie.zone
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        3 days ago

        Dad?

    • herrvogel@lemmy.world
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      3 days ago

      Ah. The birthday of Todd Howard’s favorite cash cow.

  • osaerisxero@kbin.melroy.org
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    4 days ago

    2048 going to pop off

  • Rokin@leminal.space
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    4 days ago

    I don’t know how to appreciate this.

    • Klear@lemmy.world
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      4 days ago

      A good response is to go and binge watch Numberphille

    • chortle_tortle@mander.xyz
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      3 days ago

      I know some numerology folks with mushrooms.

    • altphoto@lemmy.today
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      4 days ago

      Lube and paper towels? Or just the lube? Or just the paper towels?

  • frightful_hobgoblin@lemmy.ml
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    4 days ago

    The last two say the same thing in different forms

    • indepndnt@lemmy.world
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      4 days ago

      Pretty much everything in this post just says 2025 in different forms.

    • 0ops@piefed.zip
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      4 days ago

      > frightful_hobgoblin discovered algebra

  • CyprianSceptre@feddit.uk
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    4 days ago

    Just for completeness, add 0 and you have the complete set of single digits.

  • Lovable Sidekick@lemmy.world
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    3 days ago

    Here’s one I found by accident myself. Multiplying all the odd numbers from 1 to 13 = 135135.

  • TheReturnOfPEB@reddthat.com
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    4 days ago

    and in certain context (44 > 45) && (46 > 47)

  • banazir@lemmy.ml
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    4 days ago

    Well, at least the year 2025 isn’t some boring number, like, say, 1729. What an unremarkable number that is.

  • some_guy@lemmy.sdf.org
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    4 days ago

    Ok, so I’m looking for someone who knows more than me about math to verify that all of this is accurate. Cause if so, this is really awesome.

    • Gabe Bell@lemmy.worldOP
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      Open excel (or any other spreadsheet app) or - at a push - the calculator app.

      Type in 45 * 45. You will get 2025. Then try 44 * 44 and 46 * 46. You don’t need a PhD to be able to do that :)

      Then you can use the same app to add up 1 - 9 and get 45, which will verify most of the post.

      The cube thing is a little more complex, but you should be able to work it out using the multiply and the memory function.

      (I checked it before I posted it :))

      • irelephant [he/him]@lemmy.dbzer0.com
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        4 days ago

        Better idea: Open Excel, press ctrl + left, then ctrl + down. Put a dot in that cell, press ctrl + a to select all cells and change the shading color to black. This way you can print 34 million black pages and get fired.

      • flicker@lemmy.dbzer0.com
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        I have terrible news for you. There is a whole swath of the population who do not care enough about math to ever get past step 1 (Open Excel.)

        • Gabe Bell@lemmy.worldOP
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        • indepndnt@lemmy.world
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          True, but if it’s any consolation to OP, I’m an accountant. Excel is always open.

        • Ech@lemmy.ca
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          4 days ago

          Or a basic calculator, apparently.

    • Tarquinn2049@lemmy.world
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      “Complicated” math is built out of simple math.

      Squared and cubed are just ways of saying the same number multiplied by itself twice(squared) and thrice(cubed).

      The reasons why they are called that is a reference to the most common use of that math, a square has 2 equal dimensions, and a cube has 3. So when someone asks what is the area of a square with side lengths of 5, it would be 5 x 5, or the volume of a cube with the same side length would be 5 x 5 x 5.

      So taking this shorthand 2^3, and converting it into the full “simple math” equation it represents would be: 2 x 2 x 2.

      The other main thing about complicated math is that there is an agreed-upon order in which we write math.

      If you haven’t gotten that far in math class, don’t worry about it yet. The whole point of learning math is that it is best to learn it in the correct order. Generally, anyone struggling with math has accidentally skipped a step along the way of learning it. All the future things you learn are dependent on knowing the previous foundational knowledge.

      So anyway, long story short.

      This is saying: 45 x 45 = 2025 And that the result of 1 x 1 x 1 added to the result of 2 x 2 x 2 added to the result of 3 x 3 x 3 added to the results of 4 x 4 x 4 added to the results of 5 x 5 x 5 added to the results of 6 x 6 x 6 added to the results of 7 x 7 x 7 added to the results of 8 x 8 x 8 added to the results of 9 x 9 x 9 would be 2025.

      And now you can see why they developed shorthand.

      • Gabe Bell@lemmy.worldOP
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        And, of course, simple maths is just maths that people hasn’t made complicated yet…

        https://www.youtube.com/watch?v=UIKGV2cTgqA

      • melsaskca@lemmy.ca
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        And thrice is just another way of saying “three times”. Don’t even get me started on “trebled”. /s

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