Can someone explain how this works?

Posted by Dan Howard on Stack Overflow See other posts from Stack Overflow or by Dan Howard
Published on 2010-06-01T10:11:51Z Indexed on 2010/06/01 10:13 UTC
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  1. Key in the first three digits of your phone number (NOT the Area code...)
  2. Multiply by 80
  3. Add 1
  4. Multiply by 250
  5. Add to this the last 4 digits of your phone number
  6. Add to this the last 4 digits of your phone number again.
  7. Subtract 250
  8. Divide number by 2

Do you recognize the answer??

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