1.   Find the GCF of 28 and 34.
    A. 4 B. 7
    C. 2 D. 1
    Hint

  2.   Find the GCF of 16, 12, and 36.
    A. 4 B. 2
    C. 6 D. 3
    Hint

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

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

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