1, 2, 3, 6, 9, 18
6
9
15
9
52. The largest is 104 itself.
2
7
2
Since 18 is a factor of 90 and it is the largest factor of itself, the greatest common factor of 18 and 90 is 18.Since 18 is a factor of 90, it is automatically the GCF.
18 - 2 = 16
The GCF is 6.
The factors of 18 are :- 18, 9, 6, 3, 2, 1 The largest factor other than 18 is therefore 9.