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Desc:Evan O'Dorney is better than you.
Category:Educational, Science & Technology
Tags:math, evan odorney, spelling bee champ
Submitted:Adham Nu'man
Date:06/07/12
Views:1305
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Comment count is 15
Bort
So it seems like, if you want the square root of 45 (about 6.7082), you start out with a guess or approximation, let's say 6 (because the answer's somewhere between 6 and 7). So start with:

f(x) = (6x + 45) / (x + 6)
f(6) = (6*6 + 45) / (6 + 6) = 6.7500

Next iteration, keep the same function but with x = 6.75:

(6*6.75 + 45) / (6.75 + 6) = 6.7059

I am guessing that the slow version would be to change the function on each pass, so it would become:

(6.75*6.75 + 45) / (6.75 + 6.75) = 6.7083

Damn smart fella. I'd let him steal my lunch money.
newbilus
But can he invent himself some pussy?

OHHHHHH!

pineapplejuicer
newbilus dropping knowledge

VoilaIntruder
Thanks for elaborating on that, Bort. It's definitely a clever idea, considering that it seems to have useful applications and, more importantly for me, is easily understood with even with a very limited background in mathematics.

Now as for the idea at the end of the video, of him teaching a class... Perhaps he could design the coursework instead? I can really only imagine his teaching experience being, uh, less than stellar. "Math is Fun and Great and Useful" is a tough sell to some jaded pre-teens.

Adham Nu'man
Helo kids, uhhhm... if, you, uhhhm... find human emotions and social interaction, uhhhhhm.... confusing... uhhhhm... and nonsensical.... uhhhhhm... and that, uhhhhhhm... scares you a little... uhhhm.... then you probably find comfort in patterns, and... uhhhhhhm... maths has lots of comforting patterns.

TheQuakeSoldier
Sorry to burst everyone's bubble, but that formula was invented by the BABYLONIANS like 3000 years ago. It's literally the first ever approximation of a square root ever conceived.

The Babylonian formula:

f(x) = 1/2 * (x + S/x)

and then rearranged....

= 1/2 * (x^2/x + S/x)

= 1/2 * ((x^2 + S) / x)

= (x^2 + S) / 2x

= (x * x + S) / (x + x)

The formula he just "invented".

Adham Nu'man
Damn you Evan O'Dorney! DAMN YOU STRAIGHT TO HELL!

Bort
That's it, I'm getting my lunch money back.

... Waaaiiit, now I feel like I've really been cheated. Let's say we want to find the square root of S, and our first guess is x, and let's also say S/x = y. So if x is below the actual square root, y is above the actual square root, or vice versa. All this approximation is doing is splitting the difference between x and y. Sensible enough, but this is like finding out the magician didn't really steal your nose, that was actually his thumb. [SPOILERS]

Adham Nu'man
Damn you Bort! DAMN YOU STRAIGHT TO HELL!

Mister Yuck
The kid never claimed to have invented a new way to approximate square roots. He said found some formula to relate the existing fast method with an existing accurate method in a novel way that probably has implications us liberal arts majors can in no way comprehend. Or it's cool in some way that only the other aspies at Intel understand.

gambol
what's wrong with his mouth
Adham Nu'man
His reaction to that final question is what made it for me.
Squeamish
Who the hell wears a shirt like that.

You look like a fool, Evan. You look like a man grown in a religious catalog.
Riskbreaker
Yeah but, can he finish Plataform Masters in less time than Uli? I DON'T THINK SO!
TeenerTot
Yay maths!
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