Phone number trick

[SpinnerBait_Nut]

1) Punch the 1st three digits of your home phone #<br />into your calculator [without the area code].<br />2) Multiply by 80.<br />3) Add 1.<br />4) Multiply by 250.<br />5) Add the last four digits of your home phone #.<br />6) Add the last four digits of your home phone # again.<br />7) Subtract 250.<br />8) Divide by 2.<br /><br />Recognize the number?<br />Sure you do, it's your's.

 

[JB]

Re: Phone number trick

<br /><br />Every time I try to figure out how that works I get a brain cramp.<br /><br />Must seem simple to math teachers. How about it??

 

[SpinnerBait_Nut]

Re: Phone number trick

Originally posted by JB:<br /> <br /><br />Every time I try to figure out how that works I get a brain cramp.

Me too JB.<br />I have square rooted it, have pied it to the nearest x=%# it and all and can not figure how it does it.<br />Hope one of them "smart" people can show me.<br />

 

[kenimpzoom]

Re: Phone number trick

Found this on the net, aint it great!!!<br /><br />********************************************<br />At first glance it looks pretty neat, but let's do a bit of math, shall we?<br /><br />If the first three digits of your phone number are "X" and the last four are "Y", then the above puzzle can be expressed as half of an equation as follows:<br /><br />(250(80X + 1) + 2Y - 250)/2<br /><br />Okay, let's expand that out a bit now. You multipy everything inside the first set of brackets by 250 and get...<br /><br />(20000X + 250 + 2Y - 250)/2<br /><br />Now, the first thing any good math geek should notice is that the two instances of 250 cancel out, leaving you with...<br /><br />(20000X + 2Y)/2<br /><br />Oooh, look at all those factors of two inside the brackets. And we're dividing by 2. So after all the cutesy steps, what are we left with?<br /><br />10000X + Y = Your phone number.<br /><br />So in other words, you take the first three digits of your phone number, add four zeroes to the end, and then replace those four zeroes with the last four digits of your phone number, and by an AMAZING COINCIDENCE, you get your phone number! WOW! <br /><br />Okay, it kind of takes the mystery out of it when you actually do the math, but someone's gotta do it.

 

[JoeW]

Re: Phone number trick

kenimpzoom,<br />Great analysis! A simple math parlor trick debunked with simple algebra.

 

[JB]

Re: Phone number trick

Thanks, KIZ.<br /><br />I knew it was simple.<br /><br />I can only figure out the complicated ones.

 

[andrewkafp]

Re: Phone number trick

Doesn't work with Aussie No's though.. <br /><br />EG<br />My no is something like 03 98954881<br />Remove area code .. becomes 98954881<br /><br />1st 3 = 989<br />x 80 =79120 +1 = 79121<br />x 250 19780250<br />add 4881 19785131 add 4881 19780012<br />-25019789762 /2 = 9894881<br />Where's the "5" gone ??<br /><br />Maybe ADMIN 5 took it for his name...

 

[SpinnerBait_Nut]

Re: Phone number trick

Hey Ken, it's more fun when you can't figure it out, but thanks anyway.<br />I guess. <br />It all looks Greek to me.

 

[kenimpzoom]

Re: Phone number trick

Guys, I didnt figure it out, just did a search on the net and found it. I have found pretty much everything I ever on the net. Aint it great! Thank you Al Gore <br /><br />I got a headache just thinking about that math.<br /><br />I would have finished college has this internet thing been around then.<br /><br />Ken

 

[SpinnerBait_Nut]

Re: Phone number trick

Originally posted by Unicorn:<br />Doesn't work with Aussie No's though..

Sorry Unicorn, just works with 7 digit numbers.

 

[andrewkafp]

Re: Phone number trick

kenimpzoom <br />"I would have finished college has this internet thing been around then."<br /><br />No you wouldn't... You would be TOO Pre-occupied like the modern teenager...<br />There are also a lot of counter-productive things on the net as well...