The Number 9

MegalodonMegalodon Regular
edited April 2011 in Tech & Games
Ok, so tell me what you guys think of this.

take any number

I randomly smashed on my keyboard and obtained 48395873947

add up all the digits (4+8+3+9+5+8+7+3+9+4+7 = 67)

repeat until you have a 1 digit number (6+7 = 13) (1 + 3 = 4)

now, subtract that number(4) from the original number (48395873947)

48395873943

your number is now divisible by 9

48395873943 / 9 = 5377319327




bonus fact: any number with digits that add up to 9, is divisible by 9 (example, 18, 27, 36, 45, 48395873943)

:D

our number system is very weird. we count from 0 to 1, then 2, 3, 4, 5, 6, 7, 8, 9, then we kind of just, go back to the beginning, except this time we add a 0 behind the 1 (or in-front of, however you want to look at it) to make a 10

what 10 really means is 9+1. both of these numbers are contained within 10, except the 9 is concealed as a 0. we kind of just shove it under the carpet

11=9+1+1
12=9+3, or 9+1+2

now, after we get past 19, our formula no longer works

9+2 ≠ 20

but....20 is really just 2 10's (which is 9+1)

ah, now do you see?

20 = 9+9+2, or 9(2) + 2, or (9+1)(2)

21= 9(2) + 3

22= 9(2) + 4

99 = 9(9) +18, or 9(11) , or (9)(9+2) if you really want to break it down

now, 3 digits is where it gets interesting

100

the easiest way to write out 100 in terms of single digit numbers would be (9)(11) + 1

but 11 is not a single digit, so we have to go with the next easiest way ;)

(9)(9+2) + 1

Now, I've figured out how to solve any number and break it down into the shortest problem using only single digit numbers. I thought it was pretty mind blowing to be honest with you guys lol

Comments

  • MayberryMayberry Regular
    edited August 2010
    Isn't pure math wonderful? You look at numbers, play with them, and discover fascinating properties and patterns. It might not have any realistic applications, but it's done just for math's sake. Students should be taught math by letting them discover it, not mindless memorization of formulas and terminology that have pretty much no use to them.
  • MegalodonMegalodon Regular
    edited August 2010
    Mayberry wrote: »
    Students should be taught math by letting them discover it, not mindless memorization of formulas and terminology that have pretty much no use to them.

    well those formulas and terminology are supposed to help you if you decide to get a math based major in college. Of course you have to pay for college, it's all a scam really. You should never have to pay anything to receive knowledge. It should all be openly taught, and of course we let the "students" choose what they want to learn. Math is fun and can help people get to the moon, for 1 tiny example. Why are we denying people who can't afford college the chance to benefit humanity as a whole?

    :o:o:o:o:o:o:o:o:o:o
  • MayberryMayberry Regular
    edited August 2010
    ^See that's the problem, even in college math is still memorization of formulas and terminology until much higher levels. For 99% of people, that's boring and useless. If students were taught to discover and research math like in other subjects, it would be much more appealing. Yes, there is memorization in other subjects but that is coupled with real hands-on labs and other fun stuff to interest students. We never get to learn the things the OP posted in school. Maybe they're injected into textbooks as little fun facts, but that does nothing. If the focus of math class was on discovery, I'm sure many more students would enjoy it.
  • MegalodonMegalodon Regular
    edited August 2010
    Mayberry wrote: »
    ^See that's the problem, even in college math is still memorization of formulas and terminology until much higher levels. For 99% of people, that's boring and useless. If students were taught to discover and research math like in other subjects, it would be much more appealing. Yes, there is memorization in other subjects but that is coupled with real hands-on labs and other fun stuff to interest students. We never get to learn the things the OP posted in school. Maybe they're injected into textbooks as little fun facts, but that does nothing. If the focus of math class was on discovery, I'm sure many more students would enjoy it.


    Yeah, I took a college math course. pre-calc, after algebra and shit. I got a B or a C, I can't remember, think it was a B cause they go by 10 point grading scale so it's like "hey, in highschool you were smart and now you got a 80 and you still have a B! GOODJOB DURR YAY" highschool was all about getting as close to 96, then you get an A and you don't have to strive for the extra 4 percent to impress anyone, you know? basically a way to keep us dumb and have us think we're smart.

    I can agree with you on some level that it's boreing, seeing as they hardly show any effort to interest you. They just fucking cram formulas and laws and fucking omg I fucking hate memorizing sin cos tan and like the 1 billion other shit you gotta memorize in calculus fuck that shithtateatehahhgha I thought it was going to be easy the first weeks...my grade started to slip when that shit got hard as fuck to get good grades on tests when you can't remember 1 little formula, and plus my teacher was a COMPLETE BITCH

    she would take off mad points for not showing ALL YOUR WORK like, every fucking step and it's like wow bitch if you don't see how I skipped a few steps in my work to save paper and because it was kindergarden math to me at that point and easily solved in your head, then you're not a fucking math teacher

    they never really show you how planets move and shit

    at age 13 all children should have the knowledge from public schools to tell you where constellations are and what phase the moon will be in and shit, like forreal wtf did you really learn in school. you learned how to talk to people, bullshit, cheat, and whatever other fucking crazy adventures you had in the hallways lol
  • MayberryMayberry Regular
    edited August 2010
    Megalodon wrote: »
    you learned how to talk to people, bullshit, cheat, and whatever other fucking crazy adventures you had in the hallways lol

    Now that is pure truth :thumbsup:

    The best things you learn at school are learned outside the classroom.
  • MegalodonMegalodon Regular
    edited August 2010
    Ive learned more out of school then all 12 years of high school combined

    are you saying you've learned more from college? your sentence is implying that you've received additional education somewhere other than public schooling

    seriously does anyone else see this sentence as a mind fuck
  • MegalodonMegalodon Regular
    edited August 2010
    More fun with 9

    11111111111=9(1234567901)+2
    1111111111=9(123456790)+1 OR 9(123456789)+10 ;)
    111111111=9(12345679)
    11111111=9(1234567)+8
    1111111=9(123456)+7
    111111=9(12345)+6
    11111=9(1234)+5
    1111=9(123)+4
    111=9(12)+3
    11=9(1)+2
    1=9(0)+1
  • jamie madroxjamie madrox Sith Lord
    edited August 2010
    megalodon wrote: »
    more fun with 9

    11111111111=9(1234567901)+2
    1111111111=9(123456790)+1 or 9(123456789)+10 ;)
    111111111=9(12345679)
    11111111=9(1234567)+8
    1111111=9(123456)+7
    111111=9(12345)+6
    11111=9(1234)+5
    1111=9(123)+4
    111=9(12)+3
    11=9(1)+2
    1=9(0)+1

    111,111,111(111,111,111) = 12,345,678,987,654,321
  • MegalodonMegalodon Regular
    edited August 2010
    111,111,111(111,111,111) = 12,345,678,987,654,321

    (9(12345678)+9)^2 equals same thing heheehee

    I didn't know about that before though, aren't 9s amazing!?

    Also, 4's are pretty dope too, check this out kids...

    0


    4


    8


    12
    3

    16
    7

    20
    2

    24
    6

    28
    10
    1

    32
    5

    36
    9

    40
    4

    44
    8







    3's do the same thing, except they repeat 3,6,9 to infinity, 9 of course repeats 9
  • MegalodonMegalodon Regular
    edited April 2011
    bump in effect
  • edited April 2011
    This looks like the kind of numerical masturbation that would keep an autistic child happy for several days at a time.

    If the OP hasn't already read it, he may enjoy flicking through The Trachtenberg Speed System of Basic Mathematics. It contains less calculatory choking-the-chicken but is still interesting to read.
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