- Jan 8, 2011
- 22,361
- Grab a calculator (you won't be able to do this in your head).
- Key in the first three digits of your phone number (not your area code).
- Multiply by 80.
- Add 1.
- Multiply by 250.
- Add the last 4 digits of your phone number.
- Add the last 4 digits of your phone number again.
- Subtract 250.
- Divide number by 2.
Did you get the same number as your phone number?