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Home > AC > Chapter 3 > Lesson 3.1.1 > Problem 3-6


At the fair, Kate found a strange machine with a sign on it labeled, “Enter a number.” When she pushed the number , the machine displayed . When she entered , the machine displayed . Perplexed, she tried , and the machine displayed .

  1. What is the machine doing?

    Find a pattern.

    For every number entered into the machine, it subtracts .

  2. What would the machine display if she entered ?

    Use the pattern you found in part (a).