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3 is the greatest common factor
3
3 12 = 2^2 x 3 21 = 3 x 7 30 = 2 x 3 x 5 hcf = 3
The GCF is 21.
The GCF is 1.The GCF of 14, 21 and 24 is 1.
The GCF is: 3
The GCF is 3.
It is: 3
The GCF of 21, 30, and 72 is 3.
16 and 21