The GCF is 1.
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The answer is 1, as there are no common integers that fit evenly into both 9 and 77. They are coprime.
gcf(81, 36) = 9 gcf(27, 54) = 27 gcf(81, 36, 27, 54) = 9
9
The GCF is: 11
Of 7, 77 and 770:gcf is 7;lcm is 770.