Trick or Treat

  1. Choose a number.
  2. Add 2 to the number.
  3. Add 3 to the number.
  4. Multiply your answers from the 2nd and 3rd steps.
  5. Label that answer A.
  6. Square the number.
  7. Multiply the number times 5.
  8. Add 6 + your answers from 6 and 7.
  9. Label that answer B.
  10. Are B and A the same? (They should be!) See if that would always be the case. Repeat these steps but choose X for your number. Can you show that they will always be equal?

(source)