Cool And Useless Trick

Ok some math geek have figured out the way to find you 8 digit landline number , you only need to provide first 4 and last 4 digits to him :) .

Following is how you do it

Grab a calculator. (you won’t be able to do this one in your Head)

1. Key in the first four digits of your landline phone number (NOT the
Area code ...)
2. Multiply by 80
3. Add 1
4. Multiply by 250
5. Add to this the last 4 digits of your phone number
6. Add to this the last 4 digits of your phone number again.
7. Subtract 250
8. Divide number by 2

Do you recognize the answer ??


A pretty useless thing but some one have surely put in a lot of effort to some up with this cool trick

7 comments:

Anonymous said...

Can You show me a phone number as an example, please? I'm not from the US so this doesn't work in my country. :P

Anonymous said...

If you have to give him the first 4 numbers and the last 4 numbers of your phone number, he's already got your number so you don't have to do the math.

Anonymous said...

To the first poster...just pick any 7 digit number XXX-XXXX

Anonymous said...

@ 2nd anonymous ... that's why it is called useless :), but somebody still made some effort in creating this.

Katie said...

wow.... that is werid!

Anonymous said...

Step one should be:
Key in the first THREE digits of your landline phone number (NOT the
Area code ...)

jimboylan2 said...

This could be a Mexico City joke, where one of the competing local phone companies used 8 numeral phone numbers.

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