what is the greatest common factor of the positive integers j and k
a,k=j+1
b,jk is divisible by 5
this is from 15 testset.
a,k=j+1
b,jk is divisible by 5
this is from 15 testset.
would go with A.
1) if k=j+1, k and j are consecutive integers. any pair of consecutive integers will have the GCD as 1.
sufficient
2)jk may be 5, 10, 15, 20....
if jk=5; and j=5 and k=1 GCD is 1
if jk=20; and j=10 and k=2 GCD is 2
not sufficient
hence, A
