[Chris]

I got this from another site but this is sooo cool.

Ok follow these directions EXACTLY!
1. Get a calculator! It's too hard to do in your head.
2. Put in the first 3 digits of your phone number. (NOT the area code!)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again
8. Subtract by 250
9. Divide the number by 2

Does the last number look familiar? Its your phone number!

NOTE: Due to PEMDAS you cant just add all the numbers and hit enter once you must hit enter after every step!