1. Grab a calculator. You won't be able to do this in your head. 2. Key in the first three digits of your phone number (NOT the area code). 3. Multiply by 80 4. Add 1 5. Multiply by 250 6. Add the last four numbers of your phone number (i.e enter the four numbers as one 4 digit number) 7. Add the last four numbers of your phone number again 8. Subtract 250 9. Divide number by 2
Do you recognize the answer? It should be your phone number.
It may not work accurately if you have a zero in the middle of you number as I do but otherwise it works.
I have seen this before, it works with most random numbers if I remember correctly. Someone did try to explain to me why it works once, some complicated mathematics thing that I can't remember.