The Magical Way to Learn Mathematics

Addition Done Right

Grade level: 6-12
Difficulty level: Medium

  • Volunteers from the audience write two numbers on a board.
  • Beginning with these two numbers they construct a Fibonacci-like sequence, where each term starting with the third one is the sum of the previous two terms.
  • The volunteers are asked to write out the first ten terms and add them up.
  • Before all the ten terms are written out, the magician starts working on the same task in his/her head, and has the answer faster than the volunteers.

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