The GCF is 8.
1, 2, 4, 8.
The number is 1.
2. As this is the highest number that goes into both of them :]
72.
72 / 16 x 100 = 450
4.5
Well, darling, 56 goes into 72 just once. That's it, no more, no less. Simple math, no need to complicate things.
4 with remainder 8.
It is: 1
The number is 1.
Only the number one.
It is: 1
The GCF is 8.
1 and 3.
1 or 3 or 9
The HCF is 4