Factors of 18: 1, 2, 3, 6, 9, 18
Factors of 20: 1, 2, 4, 5, 10, 20
The common factors are: 1, 3
1, 2, 3 and 6
Since 18 is a factor of 36, all the factors of 18 will be common to 36. 1,2,3,6,9,18
Because 18 is a factor of 36. All of its factors, including itself, are common to 36.
3
It is: 126
It is 9
Factors of 20:1,2,4,5,10,20Factors of 65:1,5,13,65The common factors are 1 and 5.
72
The GCF is 18.
The GCF is 9.
126