Composite Numbers

  1. Pick a number.
  2. Multiply this number by 200.
  3. Add 836 to the new number.
  4. Divide the new number by 2.
  5. If you have already had your birthday this year, add 1581. If you haven’t, add 1580.
  6. Last step: Subtract the four digit year that you were born.

Try the process a few times with different initial numbers. Why are the results significant? Explain why the process produces this pattern.