GCF/LCM Worksheet
1 a.  Find the GCF of these numbers:
64,  59
 
 
1 b.  Find the LCM of these numbers:
80,  49
 
 
2 a.  Find the GCF of these numbers:
4,  92
 
 
2 b.  Find the LCM of these numbers:
69,  5
 
 
3 a.  Find the LCM of these numbers:
87,  24
 
 
3 b.  Find the GCF of these numbers:
11,  33
 
 
4 a.  Find the LCM of these numbers:
4,  16
 
 
4 b.  Find the GCF of these numbers:
52,  39
 
 
5 a.  Find the LCM of these numbers:
38,  32
 
 
5 b.  Find the GCF of these numbers:
48,  56
 
 
6 a.  Find the LCM of these numbers:
39,  26
 
 
6 b.  Find the LCM of these numbers:
32,  18
 
 
7 a.  Find the GCF of these numbers:
99,  54
 
 
7 b.  Find the LCM of these numbers:
61,  55
 
 
8 a.  Find the GCF of these numbers:
76,  20
 
 
8 b.  Find the LCM of these numbers:
67,  19
 
 
9 a.  Find the LCM of these numbers:
46,  64
 
 
9 b.  Find the LCM of these numbers:
82,  13
 
 
10 a.  Find the LCM of these numbers:
29,  56
 
 
10 b.  Find the GCF of these numbers:
88,  55
 
 
Page 2

Answer Key

1 a.  1

 
1 b.  3920

 
2 a.  4

 
2 b.  345

 
3 a.  696

 
3 b.  11

 
4 a.  16

 
4 b.  13

 
5 a.  608

 
5 b.  8

 
6 a.  78

 
6 b.  288

 
7 a.  9

 
7 b.  3355

 
8 a.  4

 
8 b.  1273

 
9 a.  1472

 
9 b.  1066

 
10 a.  1624

 
10 b.  11

 

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