what is the greatest common factor of the positive intergers j and k
1, k=j+1
2, jk is divisible by 5
pls, help with this
1, k=j+1
2, jk is divisible by 5
pls, help with this
My guess will be A.
1. tells you that k = j + 1. If this is the case, you can safely say that j and k are consecutive numbers. The greatest common factor for consecutive numbers is always 1. Test this for any pair of consecutive integers.
2. is insufficient, IMO. jk is divisible by 5 = at least one of the two integers is divisible by 5. However, there are many possible cases:
a. j = 5 and k = 10 - greatest common factor 5
b. j = 6 and k = 30 - greatest common factor 6
c. j = 20 and k = 100 - greatest common factor 20
