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Posted by Joss Weatherby on Feb-08-2010 10:30:

Math mind bender!!!

Ok I am either stupid or this is too hard...

How do you derive the following relationship between the following numbers using the same equation with the only variable being the first number.

10 = 1
8 = 10
6 = 100
4 = 1000
2 = 10000

The only number that can change in the equation is the first one given above (10, 8, 6, 4, 2).

Posted by Joss Weatherby on Feb-08-2010 10:35:

Oh I think someone else got it for me...

Its not perfect but it works... 100,000 * 0.31623^x

I just floor it to get the value I need.

Posted by Joss Weatherby on Feb-08-2010 10:43:

Oh even better, its the recipricol of the square root of 10 to the power of x times 100,000

100000 * (1/sqrt 10)^10
100000 * (1/sqrt 10)^8
100000 * (1/sqrt 10)^6
100000 * (1/sqrt 10)^4
100000 * (1/sqrt 10)^2

woot.

Posted by Lews on Feb-08-2010 10:52:

Fuck math.

Posted by Joss Weatherby on Feb-08-2010 10:53:

quote:
Originally posted by Lews
Fuck math.

Yea but when you need to parse MGRS references it helps to be able to tell wtf you need to multiply it to get the 10 digit reference.

Posted by Meat187 on Feb-08-2010 11:37:

10^((10-x)/2)

Posted by Joss Weatherby on Feb-08-2010 11:58:

quote:
Originally posted by Meat187
10^((10-x)/2)

God damn it, I had something ALMOST EXACTLY like that at first.

Posted by Darkarbiter on Feb-08-2010 13:07:

Re: Math mind bender!!!

quote:
Originally posted by Joss Weatherby
10 = 1

10 does not equal one. Please check your equation.

Posted by ziptnf on Feb-08-2010 14:07:

Re: Re: Math mind bender!!!

quote:
Originally posted by Darkarbiter
10 does not equal one. Please check your equation.

Bad joke is bad.

Posted by woscar on Feb-08-2010 16:48:

quote:
Originally posted by Joss Weatherby
recipricol

Reciprocal

Posted by Mr.Mystery on Feb-08-2010 17:42:

quote:
Originally posted by woscar
Reciprocal

Cauliflower

Posted by leph555 on Feb-08-2010 17:45:

this thread is way too advanced for me

Posted by Pokit on Feb-09-2010 05:19:

Post more stuff!

Posted by Sushipunk on Feb-09-2010 05:25:

quote:
Originally posted by Mr.Mystery
Cauliflower

Broccoli.

Posted by yukii on Feb-09-2010 05:28:

The answer is simple, just divide by zero, always works mate

Posted by KiNeTiC ENeRgY on Feb-09-2010 06:22:

quote:
Originally posted by Lews
Fuck math.

Posted by Darkarbiter on Feb-09-2010 07:18:

quote:
Originally posted by yukii
The answer is simple, just divide by zero, always works mate

but 0 doesn't equal any of those. It might/can equal them but it doesn't exactly equal them

quote:
Originally posted by ziptnf
Bad joke is bad.

You can't really start an equation with one number equals another number(with nothing extra, and there's exceptions obviously). It doesn't.

Posted by Sushipunk on Feb-09-2010 07:22:

Shit got serious, people.

Posted by Joss Weatherby on Feb-09-2010 10:10:

Meat187 got credits in my CBA comment header.

code:/* ----------------------------------------------------------------------------
Function: CBA_fnc_mapRelPos

Description:
	Find a position relative to a known position on the map. Passing strings
	in for the Northing and Easting is the preferred way.

Parameters:
	_pos - Position in 10 digit grid format [Easting, Northing] [Array]
	_dist - Distance from the starting position [Number]
	_dir  - Direction from the starting position [Number]

Returns:
	New grid reference (10 digit) in format [Easting, Northing]
	
Examples:
	(begin example)
		_endPos = [[024,015], 20, 45] call CBA_fnc_mapDirTo;
	(end)
	(begin example)
		// preferred
		_endPos = [["024","015"], 20, 45] call CBA_fnc_mapDirTo;
	(end)
Author:
	Nou (with credit to Headspace, Rommel & Meat187 for the real math )
---------------------------------------------------------------------------- */
#include "script_component.hpp"

SCRIPT(mapRelPos);

private ["_pos","_dist","_dir","_northing","_easting","_northingSize",
         "_eastingSize","_e","_n","_posArray","_ea","_na"];

_pos  = _this select 0;
_dist = _this select 1;
_dir  = _this select 2;

if(IS_STRING(_pos)) then {
    _posArray = toArray _pos;
    _pos = [];
    _ea = [];
    for "_i" from 0 to (((count _posArray)/2)-1) do {
        _ea set [(count _ea), _posArray select _i];
    };
    _na = [];
    for "_i" from (((count _posArray)/2)) to (((count _posArray))-1) do {
        _na set [(count _na), _posArray select _i];
    };
    _pos set[0, (toString _ea)];
    _pos set[1, (toString _na)];
};

_easting = _pos select 0;
_northing = _pos select 1;

if(IS_NUMBER(_easting)) then {
    _easting = format["%1", _easting];
};
if(IS_NUMBER(_northing)) then {
    _northing = format["%1", _northing];
};

_eastingSize = (count (toArray _easting)) min 5;
_northingSize = (count (toArray _northing)) min 5;

// Convert the numbers into 5 digits out of a 10 digit ref
_e = (parseNumber _easting)*(10^((10-(_eastingSize*2))/2));
_n = (parseNumber _northing)*(10^((10-(_northingSize*2))/2));

_pos = [_e, _n];

// flip the Y position into its negative value (to compensate for the northings 
// going down)
_pos set [1, ((_pos select 1)*-1)];

//find position relative to passed position
_pos = [floor ((_pos select 0) + _dist*sin _dir), floor ((_pos select 1) + _dist*cos _dir)];
_pos set [1, ((_pos select 1)*-1)];

_pos set [0, ([_pos select 0, 5] call CBA_fnc_formatNumber)];
_pos set [1, ([_pos select 1, 5] call CBA_fnc_formatNumber)];

_pos

Posted by Meat187 on Feb-09-2010 10:16:

Awesome!

Teh c0r - where da real science is!

Posted by Lomeli on Feb-09-2010 17:24:

I wanna take math again.

Posted by ziptnf on Feb-10-2010 17:49:

quote:
Originally posted by Darkarbiter
You can't really start an equation with one number equals another number(with nothing extra, and there's exceptions obviously). It doesn't.

You didn't read his question.

quote:
How do you derive the following relationship between the following numbers using the same equation with the only variable being the first number.

10^((10-10)/2) = 1

Come on, dude.

Posted by Joss Weatherby on Feb-10-2010 18:54:

quote:
Originally posted by ziptnf
You didn't read his question.

10^((10-10)/2) = 1

Come on, dude.

I was multiplying.

Posted by Ania_xox on Feb-10-2010 18:59:

quote:
Originally posted by Meat187
10^((10-x)/2)

helluva a turn on

I hope you're hot. You don't have to be hot actually, I just hope you're tall and cocky.

Posted by tachobg on Feb-11-2010 05:44:

quote:
Originally posted by Lews
Fuck math.

Where are you coming from with that? Most people "hate math" because it was boring and pointless when they did it in school. But most people don't have a clue what mathematics is, because mathematics is not taught in schools. What is taught, is a set of procedures for manipulating figures, symbols, etc. That's like an art academy teaching students how to draw straight lines instead of letting them be creative and teaching them how to explore. Most people also have some idea that math is useful (say, for doing your taxes) which also misses the point that 1) math is far more useful than that 2) mathematicians study math because they find it beautiful, not because it's useful. And I think the conclusion people come to is "mathematicians are out of their minds for studying something so stupid" rather than "maybe they're on to something that I don't know about".

Anyway. Not judging you, just ranting about how completely misunderstood math is.

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