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Phone Number Math Trick

You will need a calculator to do this trick

  • Key in the first three digits of your 7-digit phone number (NOT the area code)
  • Multiply by 80
  • Add 1
  • Multiply by 250
  • Add the last 4 digits of your phone number
  • Add the last 4 digits of your phone number again
  • Subtract 250
  • Divide number by 2

If you did everything right the result should be your 7-digit phone number.

Thanks to my friend Andrea for sending me this trick.