Factoring Worksheet

Factor the following numbers to their prime factors.

1 a.   31

 
1 b.   71

 
2 a.   8

 
2 b.   100

 
3 a.   43

 
3 b.   89

 
4 a.   42

 
4 b.   25

 
5 a.   62

 
5 b.   97

 
6 a.   79

 
6 b.   10

 
7 a.   8

 
7 b.   21

 
8 a.   7

 
8 b.   70

 
Page 2

Answer Key

1 c.  prime
1 c.  prime
2 c.  23
2 a.  22 × 52
3 b.  prime
3 b.  prime
4 b.  2 × 3 × 7
4 c.  52
5 a.  2 × 31
5 b.  prime
6 b.  prime
6 b.  2 × 5
7 b.  23
7 a.  3 × 7
8 b.  prime
8 b.  2 × 5 × 7


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