1.   Determine which number is not prime.
    A. 11 B. 19
    C. 57 D. 61
    Hint

  2.   Find the prime factorization of 126.
    A. 2 3 3 7 B. 2 3 3
    C. 2 × 3 × 7 D. 2 2 3 3 7
    Hint

  3.   The volume of a box is found by multiplying its height h, length l, and width w. If the measure of the volume of a box is 385, what could its dimensions be?
   
    A. 3 by 5 by 8 B. 5 by 7 by 11
    C. 3 by 5 by 7 D. 5 by 7 by 7
    Hint

  4.   The rectangles show that the number 23 ______.
   
    A. has three factors B. is composite
    C. is prime D. is neither prime nor composite
    Hint

  5.   Find the prime factorization of 105.
    A. 5 × 21 B. 2 × 5 × 7
    C. 5 × 15 D. 3 × 5 × 7
    Hint