The Magical Way to Learn Mathematics

The Power of 3

Grade level: 6-10
Difficulty level: Medium

  • Volunteers from the audience write three numbers from 1 to 9 on a board.
  • They multiply each of these numbers by 3 and record the products.
  • Then they multiply each digit in the result of the previous step by 3 and again record the products.
  • They cross out one digit from the result of the previous step and add up the rest the digits.
  • The magician is told the value of the sum and names the crossed out digit.

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