GCF/LCM Worksheet 1

Find the greatest common factor of the following numbers.

1a.   45,  90
 
 
   
1b.   38,  80
 
 
   
2a.   12,  56
 
 
   
2b.   50,  20
 
 
   
3a.   13,  65
 
 
   
3b.   4,  80
 
 
   
4a.   10,  55
 
 
   
4b.   93,  33
 
 
   
5a.   90,  36
 
 
   
5b.   32,  96
 
 
   
6a.   1,  80
 
 
   
6b.   28,  14
 
 
   
7a.   36,  12
 
 
   
7b.   3,  78
 
 
   
8a.   16,  100
 
 
   
8b.   92,  100
 
 
   

 

Answer Key

 

Copying permission: You are free to copy this worksheet to any number of students for their mathematics work. Do not distribute on websites,
books, or any such material without permission.
Copyright Maria Miller / HomeschoolMath.net free worksheets