1.   Look at the factors of 18 and 30. What is the greatest common factor?
factors of 18: 1, 2, 3, 6, 9, 18
factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
    A. 3 B. 2
    C. 5 D. 6
    Hint

  2.   Find the GCF of 24 and 54.
    A. 6 B. 3
    C. 12 D. 2
    Hint

  3.   Which two numbers have a GCF of 9?
    A. 45, 95 B. 36, 39
    C. 18, 36 D. 36, 45
    Hint

  4.   Find the GCF of 32 and 42.
    A. 4 B. 14
    C. 2 D. 3
    Hint

  5.   Find the GCF of 33, 48, and 54.
    A. 2 B. 8
    C. 3 D. 1
    Hint