Question

Can you help me understand how to find the greatest common factor.

Answer 1

`The GCF of what?
For example:
to find the GCF of 27 and 54 you put out all their factors and find which is the highest they have in common:
27 factors:
1 27
3 9

54 factors:
1 54
2 27
3 18
6 9
The GCF is 27
Its pretty simple, but it depends the situation also:)

Answer 2

81,91 GCF=

Answer 3

81=3*3*3*3
91=7*13

- so than what will be ?