Factoring Worksheet

Factor the following numbers to their prime factors.

1 a.   48

 
1 b.   43

 
2 a.   67

 
2 b.   39

 
3 a.   18

 
3 b.   42

 
4 a.   13

 
4 b.   66

 
5 a.   23

 
5 b.   40

 
6 a.   89

 
6 b.   57

 
7 a.   64

 
7 b.   78

 
8 a.   30

 
8 b.   11

 
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Answer Key

1 c.  24 × 3
1 b.  prime
2 b.  prime
2 b.  3 × 13
3 b.  2 × 32
3 b.  2 × 3 × 7
4 c.  prime
4 c.  2 × 3 × 11
5 c.  prime
5 c.  23 × 5
6 b.  prime
6 b.  3 × 19
7 b.  26
7 a.  2 × 3 × 13
8 c.  2 × 3 × 5
8 c.  prime


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