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The GCF is 3.
GCF of 6 and 15 is 3.
30
The GCF is 6.
The GCF is 9.
The GCF is 4.
The GCF is 30.
50
The GCF is: 1
The GCF is 27.
The GCF is 1.
The GCF is 5.
The GCF is 2.