GCF - easy
GCF - difficult
LCM - easy
LCM - difficult
Reduce fraction
100
GCF of 15 & 20
5
100
GCF of 36, 54
18
100
LCM of 4, 6
12
100
LCM of 30, 120
120
100
Reduce 14/49
2/7
200
GCF of 18, 10
2
200
GCF of 36, 72
18
200
LCM of 10, 15
30
200
LCM of 25, 30
150
200
Reduce 33/36
11/12
300

GCF of 20, 24

4

300
GCF of 54, 81
27
300
LCM of 12, 18
36
300
LCM of 48, 36
144
300
Reduce 36/54
2/3
400
GCF of 45, 36
9
400
GCF of 48, 72
24
400
LCM of 16, 24
48
400
LCM of 42, 28
84
400
Reduce 28/42
2/3
500
GCF of 42, 28
14
500

GCF of 52 and 91

13

500
LCM of 15, 25
75
500
LCM of 12, 80
240
500
Reduce 72/96
3/4
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