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

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

  3.   Find the GCF of 38 and 49.
    A. 4 B. 3
    C. 1 D. 2
    Hint

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

  5.   Which two numbers have a GCF of 7?
    A. 7, 17 B. 25, 45
    C. 21, 63 D. 35, 126
    Hint