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The GCF is 3.
The GCF is 6.
It is 7
7
If you mean: 21, 49 and 84 then the HCF is 7
The GCF is 1.
The GCF is 7.
The HCF of 21, 84 and 91 is.... 1 ! The number 91 is a prime number.
It is: 7
The HCF is 7
The GCF is 24.
It is: 1
It is: 21