Factoring Worksheet

Factor the following numbers to their prime factors.

1 a.   79

 
1 b.   21

 
2 a.   11

 
2 b.   73

 
3 a.   81

 
3 b.   43

 
4 a.   62

 
4 b.   73

 
5 a.   52

 
5 b.   69

 
6 a.   56

 
6 b.   91

 
7 a.   12

 
7 b.   73

 
8 a.   15

 
8 b.   56

 
Page 2

Answer Key

1 c.  prime
1 c.  3 × 7
2 b.  prime
2 b.  prime
3 b.  34
3 a.  prime
4 a.  2 × 31
4 b.  prime
5 b.  22 × 13
5 b.  3 × 23
6 b.  23 × 7
6 b.  7 × 13
7 b.  22 × 3
7 b.  prime
8 b.  3 × 5
8 b.  23 × 7


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