GCF/LCM Worksheet
1 a.  Find the LCM of these numbers:
43,  73
 
 
1 b.  Find the LCM of these numbers:
96,  78
 
 
2 a.  Find the LCM of these numbers:
64,  96
 
 
2 b.  Find the GCF of these numbers:
33,  77
 
 
3 a.  Find the LCM of these numbers:
75,  19
 
 
3 b.  Find the GCF of these numbers:
50,  95
 
 
4 a.  Find the LCM of these numbers:
79,  80
 
 
4 b.  Find the LCM of these numbers:
92,  47
 
 
5 a.  Find the GCF of these numbers:
84,  56
 
 
5 b.  Find the LCM of these numbers:
60,  27
 
 
6 a.  Find the GCF of these numbers:
15,  60
 
 
6 b.  Find the GCF of these numbers:
26,  13
 
 
7 a.  Find the GCF of these numbers:
80,  55
 
 
7 b.  Find the LCM of these numbers:
17,  74
 
 
8 a.  Find the GCF of these numbers:
33,  21
 
 
8 b.  Find the LCM of these numbers:
12,  68
 
 
9 a.  Find the GCF of these numbers:
8,  88
 
 
9 b.  Find the GCF of these numbers:
16,  72
 
 
10 a.  Find the LCM of these numbers:
92,  43
 
 
10 b.  Find the GCF of these numbers:
75,  45
 
 
Page 2

Answer Key

1 a.  3139

 
1 b.  1248

 
2 a.  192

 
2 b.  11

 
3 a.  1425

 
3 b.  5

 
4 a.  6320

 
4 b.  4324

 
5 a.  28

 
5 b.  540

 
6 a.  15

 
6 b.  13

 
7 a.  5

 
7 b.  1258

 
8 a.  3

 
8 b.  204

 
9 a.  8

 
9 b.  8

 
10 a.  3956

 
10 b.  15

 


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