Yes.
yes.
No, coprime numbers have no common factors other than one; 15 and 24 both have the factor 3, so they are not coprime.
1. They are coprime.
The GCF is 1.
No, since 17 and 24 are coprime integers (17 is a prime number).
GCF(6, 11) = 1. The numbers are coprime.
101
13
The GCF is 1.
Since the numbers are coprime, the answer is 9*11*16 = 1584
115 and 24 are coprime: they have no factor in common (other than 1). Therefore, the fraction 115/24 cannot be simplified.