NAME________________________________________________DATE_______________________________________________

 

QUIZ – Prime and Composite Numbers and GCF

 

WORD BANK:            greatest common factor (GCF)               composite                prime

 

  1. Numbers that have exactly two factors, 1 and the number itself, are called

      __________________________________________.

 

  1. The greatest factor that two or more numbers have in common is called the           

 

___________________________________________.

 

  1.  Numbers that have three or more factors are called ______________________________________.

 

 Write    PRIME   or     COMPOSITE   for    #4 and   #5.

 

        4.)    31   _______________________________

 

        5.)    50    _______________________________

 

6.      Circle the PRIME number.

  

                 63               92                    47                    70

 

 

7.      Circle the COMPOSITE  number.

 

 7                     13                    72                    97

 

 

   Find the prime factorization for each number (use factor trees). Write the greatest common factor (GCF).

 

8.)         12, 48

 

       

 

    List all the factors for each number.  Find the GCF.

9.)         21, 35

 

 

 

  10.)   Circle the numbers 210 is divisible by:

              2     3     4     5     6     9     10