GCF of 30 and 31 is 1.
This is a ridiculous question, due to the fact that 31 is a prime number. Therefore, as 31 is not a factor of 30, the highest common factor can only be 1.
The GCF is 1 since there are no common factors.
The GCF is 31.
The GCF is 1.
HCF(31, 40) = 1. The two numbers are co-prime.
The GCF is 31.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF of 31 and 6 is 1.
The GCF is 31.
The GCF is 30.