Tilted Forum Project Discussion Community  

Go Back   Tilted Forum Project Discussion Community > The Academy > Tilted Knowledge and How-To


 
 
LinkBack Thread Tools
Old 10-27-2004, 09:29 AM   #1 (permalink)
Junkie
 
biznatch's Avatar
 
Location: France
The cool numbers thread.

OK. To start it off, and give credit, I read this book by french author Bernard Werber(who obvioulsy did not find this info himself, but w/e).
This is an interesting random cool number I found in it.
142 857 (or, for americans...142,857)

let's start by multiplying this number by 1, 2, 3, 4, 5, and 6....
142 857 x 1 = 142 857 ....(obvioulsy)
142 857 x 2 = 285 714
142 857 x 3 = 428 571 (hmm..)
142 857 x 4 = 571 428 (hmmmmmmmmmmm.....)
142 857 x 5 = 714 285
142 857 x 6 = 857 142
OK. To those of you who haven't noticed, the results have exactly the same numbers, but it seems the order has been shifted each time...cool right??
But wait. It's not over...
142 857 x 7?
.
.
.
999 999!!! Strange, huh?....
especially when..
142 + 857 = 999
and, oh wait...
14 + 28 + 57 = 99
142 857 square, or 142 857^2 = 20408122449
and 20408 + 122449 = 142 857
cool right?

Last edited by biznatch; 10-27-2004 at 02:45 PM.. Reason: typo...sorry guys
biznatch is offline  
Old 10-27-2004, 09:31 AM   #2 (permalink)
A boy and his dog
 
Schwan's Avatar
 
Location: EU!
Actually, it is. I always sucked at math, but this is fun
Schwan is offline  
Old 10-27-2004, 09:58 AM   #3 (permalink)
Easy Rider
 
flstf's Avatar
 
Location: Moscow on the Ohio
Very cool. I always wonder when I see numbers like this if there is some secret to the nature of things that might be useful in predicting the stock market, etc.. kinda like in "Pi, the Movie".
flstf is offline  
Old 10-27-2004, 10:07 AM   #4 (permalink)
Tilted
 
Location: Singapore
Wow, that's really interesting! The sheer concidence, or is it? Hmm...
Thanks for sharing, I probably never would have known this otherwise. I can only guess at the amount of research that went into it.

Is there any other number with similar properties? Is there a name for such a number?

/reminds myself to read this up.
Ydde is offline  
Old 10-27-2004, 10:09 AM   #5 (permalink)
Junkie
 
biznatch's Avatar
 
Location: France
I'll try to look for some other cool numbers, I have stumbled across some other ones, but none with an many cool things as this one.
biznatch is offline  
Old 10-27-2004, 01:26 PM   #6 (permalink)
Psycho
 
keyshawn's Avatar
 
dont forget E^pi*i = 1

[thats "e" euler's number, raised to the power of the product 'pi' and 'i']

equals one.
strange..
keyshawn is offline  
Old 10-27-2004, 01:39 PM   #7 (permalink)
Insane
 
Cadwiz's Avatar
 
Location: work
That is really cool. Math has a lot of cool stuff going on, if you can get past the boring parts.
__________________
Semper Fi
Cadwiz is offline  
Old 10-27-2004, 02:40 PM   #8 (permalink)
Baltimoron
 
djtestudo's Avatar
 
Location: Beeeeeautiful Bel Air, MD
Actually, 142,857 x 9 = 1,285,713...
__________________
"Final thought: I just rented Michael Moore's Bowling for Columbine. Frankly, it was the worst sports movie I've ever seen."
--Peter Schmuck, The (Baltimore) Sun
djtestudo is offline  
Old 10-27-2004, 02:48 PM   #9 (permalink)
Junkie
 
biznatch's Avatar
 
Location: France
Quote:
Originally Posted by djtestudo
Actually, 142,857 x 9 = 1,285,713...
thanks man, I meant 142,857 x 7
biznatch is offline  
Old 10-27-2004, 03:29 PM   #10 (permalink)
Tilted
 
Learned it a long time ago (you might have seen it before)
98765432 / 8 = 12345679
(it is supposed to be done on the old calculators that you can only put 8 nubers in)
Jay_Jay is offline  
Old 10-28-2004, 10:42 AM   #11 (permalink)
Psycho
 
All numbers are "cool numbers."

Proof:

1. Assume that not all numbers are cool.

2. Divide the numbers into the set of cool numbers and the set of
not-cool numbers.

3. Now, consider the set of not-cool numbers. One of them is less than
all of the others, which means it is the lowest not-cool number in the
universe! Hey, that's pretty cool. Move it to the cool number set.

4. Repeat step 3 until the not-cool set is empty. This means that all
numbers are cool, QED.
TwoToTango is offline  
Old 10-28-2004, 11:56 AM   #12 (permalink)
Sky Piercer
 
CSflim's Avatar
 
Location: Ireland
A book that you be interested in is "Curious and Interesting Numbers" by David Wells.
It has a whole load of numbers, all put in numerical order, so its almost like a number dictionary.

Opening it at random i find things such as:

371 = 3<sup>3</sup> + 7<sup>3</sup> + 1<sup>3</sup>

12,321 = 111<sup>2</sup>, also 1,234,321 = 1111<sup>2</sup>, etc.


3,628,800
Equal to 10! and the only factorial that is the product of other consecutive factorials (apart from the trivial ones involving 1!).
10! = 6! * 7!

10! also equals 3! * 5! * 7!.

These examples are all very short, but some of the explainations go on for paragraphs or even pages (esp. pi, e, phi, etc.).

Interesting book, but not exactly cover to cover reading!
__________________
CSflim is offline  
Old 10-28-2004, 01:30 PM   #13 (permalink)
Psycho
 
To prove: 0.9 repeating = 1

[proof follows below]

1. let x = 0.9 repeating
2. multiply each side by ten, giving

10x = 9.9 repeating

3. subtract x from the left, 0.9 repeating
from the right, giving

9x = 9

4. divide both by nine, giving

x = 1

5. yet x = 0.9 repeating
6. therefore

0.9 repeating = 1

ehh, I didn't relize there was a thread on this. I apologize for my ignorance.
muckluck is offline  
Old 10-29-2004, 08:26 AM   #14 (permalink)
Tilted
 
Location: Singapore
Quote:
Originally Posted by TwoToTango
All numbers are "cool numbers."

Proof:

1. Assume that not all numbers are cool.

2. Divide the numbers into the set of cool numbers and the set of
not-cool numbers.

3. Now, consider the set of not-cool numbers. One of them is less than
all of the others, which means it is the lowest not-cool number in the
universe! Hey, that's pretty cool. Move it to the cool number set.

4. Repeat step 3 until the not-cool set is empty. This means that all
numbers are cool, QED.
Haha. That's quite...cool.
Did you think that up yourself?
Ydde is offline  
Old 11-01-2004, 08:21 AM   #15 (permalink)
Psycho
 
Quote:
Originally Posted by Ydde
Haha. That's quite...cool.
Did you think that up yourself?
Dim memory tells me it showed up in an ancient
Martin Gardner column in Scientific American &mdash;
originally phrased as a proof that there are no
"uninteresting" numbers.
TwoToTango is offline  
Old 11-01-2004, 05:40 PM   #16 (permalink)
Insane
 
JustDisGuy's Avatar
 
Location: Saskatchewan
The coolest number of all of course is "42".

For those of you for whom this makes no sense, I refer you to "The Hitch-hiker's Guide to the Galaxy" by the late Douglas Adams.
__________________
"Act as if the future of the universe depends on what you do, while laughing at yourself for thinking that your actions make any difference."
JustDisGuy is offline  
Old 11-01-2004, 05:41 PM   #17 (permalink)
Tilted
 
Quote:
dont forget E^pi*i = 1
e^(Pi*i)=-1 not 1.

Quote:
All numbers are "cool numbers."

Proof:

1. Assume that not all numbers are cool.

2. Divide the numbers into the set of cool numbers and the set of
not-cool numbers.

3. Now, consider the set of not-cool numbers. One of them is less than
all of the others, which means it is the lowest not-cool number in the
universe! Hey, that's pretty cool. Move it to the cool number set.

4. Repeat step 3 until the not-cool set is empty. This means that all
numbers are cool, QED.
Your partition results in infinite unbounded sets either upper or lower, so point 3 is not true.

9 is probably the most interesting number i know.

Last edited by daking; 11-01-2004 at 05:46 PM..
daking is offline  
Old 11-02-2004, 02:17 AM   #18 (permalink)
Upright
 
Quote:
Originally Posted by JustDisGuy
The coolest number of all of course is "42".

For those of you for whom this makes no sense, I refer you to "The Hitch-hiker's Guide to the Galaxy" by the late Douglas Adams.

Aye! that's a most interesting read!! i strongly recommend it to anyone. It's actually a trilogy in four parts. Excellent stuff.
planets is offline  
Old 11-02-2004, 02:35 AM   #19 (permalink)
Tilted
 
Location: Vancouver BC
daking dont be a smartass!
disgruntled is offline  
Old 11-02-2004, 08:33 AM   #20 (permalink)
Tilted
 
Heheh yea im sorry was in a bad mood last nite Monitor broke . My appologies
daking is offline  
Old 11-07-2004, 02:30 AM   #21 (permalink)
Crazy
 
Location: San Diego, CA
The original post is indeed interesting, but it is also mere coincidence. Let me state a couple reasons:

1) Everything done to the number is dependent that it is base 10. Numbers, by definition, are base-less, and we use bases simply to express them. This means that there is most probably a number in every other base that fits this property, but is also probably not the same number.

2) If I came up with a number of random properties that would be "cool" I could use simple algebra and/or my computer to find a number that fit those properties, then post it around the internet as if it were a neat find. Is it really that cool, though? Not really very useful, if you ask me.

Sorry if this ruined the mood of the post. As I said, I think it's a pretty neat number, but from a mathematics theory standpoint, not a very useful find.
__________________
"Don't believe everything you read on the internet. Except this. Well, including this, I suppose." -- Douglas Adams
Rangsk is offline  
Old 11-07-2004, 12:16 PM   #22 (permalink)
Crazy
 
Location: Top of the World, Mom!
Cool number ideed, saw this somewere recently.
__________________
Live life like you're gonna die, beacause you're gonna!

- William Shatner.
Thermopyle is offline  
Old 11-07-2004, 01:16 PM   #23 (permalink)
Squid
 
MikeyChalupa's Avatar
 
Location: USS George Washington
Quote:
Originally Posted by Jay_Jay
Learned it a long time ago (you might have seen it before)
98765432 / 8 = 12345679
(it is supposed to be done on the old calculators that you can only put 8 nubers in)
Same type of thing...

10101010 x 10101010 = 10203040

What it really equals is 102030403020100.

-Mikey
MikeyChalupa is offline  
Old 11-08-2004, 10:12 PM   #24 (permalink)
Crazy
 
Location: Melb - Australia
damn freaky
i allways hated maths.....................but now.................nup i still do

but its still freaky

Cheers
__________________
--------------------
Cheers
Arachnid is offline  
Old 11-14-2004, 08:52 AM   #25 (permalink)
Tilted
 
Quote:
Originally Posted by planets
It's actually a trilogy in four parts. Excellent stuff.
5 parts actualy.
unregistered092 is offline  
Old 11-14-2004, 09:51 PM   #26 (permalink)
Crazy
 
Math... at least it's good for something! j/k

-BD
BoltedDown is offline  
Old 11-15-2004, 08:01 AM   #27 (permalink)
Tilted
 
Location: Singapore
The number 9 is pretty cool actually.

9 multiply by anything, then adding that number up give you back a 9. Quite neat isn't it.

Eg. 9 x 3 = 27
2 + 7 = 9
Ydde is offline  
Old 11-16-2004, 07:43 AM   #28 (permalink)
Tilted
 
Quote:
Originally Posted by CSflim
12,321 = 111<sup>2</sup>, also 1,234,321 = 1111<sup>2</sup>, etc.
This one is relatively easy to explain - it will work for all 1-based numbers. Consider 11:
Code:
   11
  x11
---------
   11
  11  
--------
  121
Every 1-based number is results in the same type of thing - just adding the number times the various factors of 10, and then sum. ie
11*11 = 11*1 + 11*10 = 121
111*111 = 111*1 + 111*10 + 111*100 = 12321

Last edited by ergdork; 11-16-2004 at 07:46 AM..
ergdork is offline  
Old 11-23-2004, 12:27 AM   #29 (permalink)
Crazy
 
trib767's Avatar
 
Location: London, UK
Not particularly scientific, but...
take a calculator key-pad. any 3 digit number pattern added to the pattern "reflected" through the centre of the keypad gives the same answer, 1110.

For example, 789 + 123, 654 + 456, 147 + 963
Slightly more interesting: 748 + 362
trib767 is offline  
Old 11-23-2004, 01:05 AM   #30 (permalink)
Tilted
 
Any number theorists in our midst? I'm sure they come across things like this pretty often...once you get into multidimensional sets things get fun and pretty to graph
johnsimon885 is offline  
 

Tags
cool, numbers, thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:07 AM.

Tilted Forum Project

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
© 2002-2012 Tilted Forum Project

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360