1989
The GCF is 1.
3, 13, and 17 share no common factors aside from 1. Hence, the gcf of 3, 13, and 17 is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is: 1
The GCF is 13.
9 since 9 * 3 = 27 and 9 * 11 = 99
45 = 5 x 9, 117 = 13 x 9. 5 and 13 are co-prime so GCF is 9.
13. (9+17)/2=13
9, and you get 17 and 2.
13 + 9 + 17 = 39