The GCF is 5.
230 - 155 = 75
The GCF is: 5
The GCF is 5
The GCF is 2.
The GCF is 2.
The GCF is 1.
The GCF is 10.
The GCF of 155 and 507 is 1.
The GCF is 5.
310
It is: 1
The GCF of 137 and 230 is 1. 137 is prime, and so its only factors are 1 and 137. Since 137 is not a factor of 230, the GCF of 137 and 230 is 1.