skinamatic Posted April 29, 2004 Share Posted April 29, 2004 Try this and see what you come up with: 1. Grab a calculator. (you won't be able to do this one in your head) 2. Key in the first three digits of your phone number (NOT the area code) 3. Multiply by 80 4. Add 1 5. Multiply by 250 6. Add the last 4 digits of your phone number 7. Add the last 4 digits of your phone number again. 8. Subtract 250 9. Divide number by 2 What do you have? Link to comment Share on other sites More sharing options...
Ancalagon the Black Posted April 29, 2004 Share Posted April 29, 2004 A completely random number. Guess it doesn't work with eight-digit phone numbers. EDIT: Ah, I can see that it'll come up with your phone number. Because it's equal to (if x is the first three digits of your number and y is the last four digits) ([250(80x+1)+2y]-250)/2 which reduces to 1000x + y which should give you your very own phone number! Link to comment Share on other sites More sharing options...
skinamatic Posted April 29, 2004 Author Share Posted April 29, 2004 Use a 7 digit and see what you get. Link to comment Share on other sites More sharing options...
Ancalagon the Black Posted April 29, 2004 Share Posted April 29, 2004 I think I figured it out (see edited post). Link to comment Share on other sites More sharing options...
section 130 Posted April 29, 2004 Share Posted April 29, 2004 Pretty darn nifty. Link to comment Share on other sites More sharing options...
Skeletor The Invincible Posted April 29, 2004 Share Posted April 29, 2004 Mr. Black was getting his order of operations mixed up. Rather, his calculator was. Link to comment Share on other sites More sharing options...
Guest J Dawg Posted April 29, 2004 Share Posted April 29, 2004 I got my full phone number pretty cool stuff. :dallasuck Link to comment Share on other sites More sharing options...
TXREDSKINS44 Posted April 29, 2004 Share Posted April 29, 2004 That is pretty cool I got my phone number! Link to comment Share on other sites More sharing options...
rdsknbill Posted April 29, 2004 Share Posted April 29, 2004 Yep me too. Skinmatic, you have WAY too much time on your hands. :laugh: EDIT: How much time do I have that I actually did the trick. :doh: :laugh: Link to comment Share on other sites More sharing options...
SlobberKnockinFootball Posted April 29, 2004 Share Posted April 29, 2004 Dude, someone has too much time on their hands to be doing this :pooh: Link to comment Share on other sites More sharing options...
SKINtil8tin Posted April 29, 2004 Share Posted April 29, 2004 Originally posted by Ancalagon the Black EDIT: Ah, I can see that it'll come up with your phone number. Because it's equal to (if x is the first three digits of your number and y is the last four digits) ([250(80x+1)+2y]-250)/2 which reduces to 1000x + y Could've used you when I was flunking algebra in high school. Link to comment Share on other sites More sharing options...
Golgo-13 Posted April 29, 2004 Share Posted April 29, 2004 Wild. Those math tricks go way over my head. I'm just a lowly social science major. Link to comment Share on other sites More sharing options...
Destino Posted April 29, 2004 Share Posted April 29, 2004 Originally posted by Ancalagon the Black A completely random number. Guess it doesn't work with eight-digit phone numbers. EDIT: Ah, I can see that it'll come up with your phone number. Because it's equal to (if x is the first three digits of your number and y is the last four digits) ([250(80x+1)+2y]-250)/2 which reduces to 1000x + y which should give you your very own phone number! Hey egghead take a hike! Link to comment Share on other sites More sharing options...
artmonkfish Posted April 29, 2004 Share Posted April 29, 2004 how does this work? don't tell me you came up with that?!! Link to comment Share on other sites More sharing options...
Drex Posted April 29, 2004 Share Posted April 29, 2004 A neat trick indeed Link to comment Share on other sites More sharing options...
NASMTrainer Posted April 29, 2004 Share Posted April 29, 2004 Originally posted by Ancalagon the Black A completely random number. Guess it doesn't work with eight-digit phone numbers. EDIT: Ah, I can see that it'll come up with your phone number. Because it's equal to (if x is the first three digits of your number and y is the last four digits) ([250(80x+1)+2y]-250)/2 which reduces to 1000x + y which should give you your very own phone number! I must have been doing time or been freeze dried, what is an eight digit phone number? Link to comment Share on other sites More sharing options...
Ancalagon the Black Posted April 30, 2004 Share Posted April 30, 2004 An eight-digit phone number is one that's in Australia. And no, didn't get my order of operations screwed up. It doesn't work if your phone number has eight digits. Link to comment Share on other sites More sharing options...
mad4comp Posted April 30, 2004 Share Posted April 30, 2004 doesnt ([250(80x+1)+2y]-250)/2) reduce to: (20000x+2y)/2: 10000x+y ? Link to comment Share on other sites More sharing options...
Ancalagon the Black Posted April 30, 2004 Share Posted April 30, 2004 You're right, mad4comp--I left out a zero. (So my answer didn't make sense anyway, given that y has four digits.) Good catch! Link to comment Share on other sites More sharing options...
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