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ANSWER :
1. GCF - 40 LCM - 80
2. GCF - 8 LCM - 16
3. GCF - 30 - LCM - 60
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Answer:
1. GCF: 20
LCM: 120
2.GCF: 8
LCM: 32
3.GCF: 10
LCM: 30