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It is: 20
The GCF is 20.
LCM(30, 40, 60) = 120 GCF(30, 40, 60) = 10
GCF(24, 40, 60) = 4
GCF(60, 40, 100) = 20.
The GCF is 4.
The GCF is 10.
The GCF of 8, 40, and 60 is 4.