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

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

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

  4.   Look at the factors of 24 and 16. What is the greatest common factor?
factors of 16: 1, 2, 4, 8, 16
factors of 24: 1, 2, 3, 4, 6, 8, 12, 24
    A. 8 B. 4
    C. 2 D. 16
    Hint

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