7
1
The HCF of 21, 84 and 91 is.... 1 ! The number 91 is a prime number.
The GCF is 28.
It is: 7
It is: 7
It is: 7
It is: 1
The GCF is 7.
7
28
If you mean 28, 49 and 84 then the hcf is 7
It is: 7
The HCF of 28 77 and 91 is 7, since 7 goes into all the numbers and all the numbers above it dont.