The GCF is: 11
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The GCF of 33 and 66 = 33
Look at the prime factorisation of both numbers: 22 = 2 * 11 77 = 7 * 11 There is only one common factor and that is 11.
The GCF is 1.
The GCF is 3.
Of 7, 77 and 770:gcf is 7;lcm is 770.