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The GCF is: 3
The GCF is 1.
The GCF is 3.
The GCF is 6.
GCF(12, 15, 18) = 3
The GCF of 12, 15, 18, and 30 is 3.
The LCF is 1. The GCF is 3.
The GCF for 612 and 18 is 18
The GCF is 2.