Try this

It's time to phone a friend for a little math fun ...get your calculator....this works!
(Note: Ignore your area code and use only your seven digit phone number. Ex: if your phone # is 077******* then forget about the first 3 digits (077) & start the game with the rest. Enjoy!!!)


1) What are the first 3 digits of your phone number? (do NOT include the area code)
2) Multiply by 80
3) Add 1
4) Multiply by 250
5) Add in the last four digits of phone number
6) Add in the last four digits of phone number again
7) Subtract 250
8) Divide by 2.

Is the result your phone number?