Magic and Tricks of Math
1. Ask your friend to think of a number 1 to 30.
2. Let him look at the cards. Then ask him "Is the number he chose in cards 1, 2, 3, 4, 5?"
3. He answers your question with a "yes" or a "no". Take note of the first number at the top of the row of each card where he saw his number. Add these numbers. The sum of these numbers is the number that he is thinking of.
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