All are divisible by 13. The difference is how many times.
The Greatest Common Factor of 143, 65, 91: 13
The GCF is 13.
-187
The GCF of 91, 143, and 146 is 1.
13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143 . . .
The GCF is 13.
The GCF is 13.
13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, 169, . . .
65 + 91 = 156
13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, 169, 182, 195 . . . ∞
13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, 169.
The GCF is 13.