0
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11
7
The GCF is 7.
7 is the highest common factor of 21, 77 and 91.
The HCF of both numbers is 11
If you mean: 55, 77 and 132 then the hcf is 11
The HCF of 77 and 161 is 7
1
It is: 1
77 and 1
110
22
10
The GCF is 11.