A Math Trick to Blow Your Kids' Minds... And Maybe Yours Too

  1. 1.
    Think of a two-digit number.
  2. 2.
    Add those two digits together.
  3. 3.
    Take your sum of those two digits and subtract it from your original number. Now you have a new number.
  4. 4.
    Take your new number and add each of its two digits together.
  5. 5.
    Now think hard about the final number you got. Try to send it to my brain...
  6. 6.
    It's coming to me.... keep thinking...
  7. 7.
    Ah!
  8. 8.
    Here it is...
  9. 9.
    For extra fun, first write the number 9 on a piece of paper, fold it up, and let your kid hold it while you do the trick together. When he comes up with 9, have him unfold the paper to see the same thing.