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

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

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

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

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