1.   Find the prime factorization of 32.
    A. 2 2 2 2 2 2 B. 2 × 3
    C. 2 2 2 2 2 D. 2 × 2 × 2 × 2
    Hint

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

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

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

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