Answer:
GCF 35, 28 is 7
GCF 36, 27 is 9
Explanation:
Greatest means biggest.
Common means same.
Factor means a number that goes evenly into the number. (3 goes into 27, so 3 is a factor of 27. 5 doesn't go evenly into 27, so 5 is not a factor of 27)
The biggest number that goes into both 35 and 28 is 7.
1, 5, 7, 35 are factors of 35.
1, 2, 4, 7, 14, 28 are factors of 28.
The biggest factor that's the same is the 7.
factors of 36:
1, 2, 3, 4, 6, 9, 12, 18, 36
Factors of 27:
1, 3, 9, 27
The biggest same factor is 9