All you need is the first 3 digits of any phone number (not the area code):


1) Ignoring your area code, key-in the first 3 digits of your phone number into the calculator
2) multiply by 80
3) then plus 1
4) multiply by 250
5) plus the last four digits of phone number
6) plus the last four digits of phone number again
7) minus 250
8) divide by 2

IS THIS YOUR PHONE NUMBER?