Factoring Worksheet

Factor the following numbers to their prime factors.

1 a.   403

 
 
 
 
 
 
1 b.   220

 
 
 
 
 
 
2 a.   120

 
 
 
 
 
 
2 b.   403

 
 
 
 
 
 
3 a.   257

 
 
 
 
 
 
3 b.   138

 
 
 
 
 
 
4 a.   157

 
 
 
 
 
 
4 b.   471

 
 
 
 
 
 
Page 2

Answer Key

1 c.  13 × 31
1 b.  22 × 5 × 11
2 c.  23 × 3 × 5
2 c.  13 × 31
3 b.  prime
3 b.  2 × 3 × 23
4 c.  prime
4 c.  3 × 157


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