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

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

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

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

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