1.   In a game of What's My Rule? the first clue was ''3 gives 3.'' Write a rule that fits this clue.
    A. output = input + 3 B. output = (input + input) ÷ 2
    C. output = input × 0 D. output = 2 ÷ input + 0
    Hint

  2.   How many toothpicks are in Term 5?
   
    A. 19 B. 16
    C. 11 D. 9
    Hint

  3.   How many toothpicks are in Term 5?
   
    A. 28 B. 18
    C. 22 D. 21
    Hint

  4.   Find a rule for the toothpick sequence.
   
    A. number of toothpicks = 4 × term number – 4
    B. number of toothpicks = 6 × term number
    C. number of toothpicks = term number + 4
    D. number of toothpicks = 4 × term number + 2
    Hint

  5.   Find a rule for the toothpick sequence.
   
    A. number of toothpicks = term number
    B. number of toothpicks = term number – 1
    C. number of toothpicks = 1 + term number
    D. number of toothpicks = 2 × term number – 1
    Hint