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

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

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

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

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