11.22.2005

Domino Magic

Imagine a box of dominos with numbers from 0 to 6. Pull out any one domino and make sure it doesn't a blank or 0 on it. Follow these steps and I'll tell you what domino you had.
  1. Multiply one of the numbers by 5.
  2. Add 7 to the product.
  3. Multiply that sum by 2.
  4. Add the other number on the domino to the product.
  5. Tell me your number, but not your domino.
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2 comments:

  1. Anonymous9:36 AM

    That's pretty cool. For a math trick.

    ReplyDelete
  2. The Math Ninja11:00 AM

    indeed. its a pretty easy one.

    ReplyDelete