Answer :
because six is the gcf is 6 and their lcm is 36 you have to find what can be divided by 6 and in one of their factors be 36 so I came up with 18
The number of all divisors of 6
6 multiples of the number 18 we find one of
so the answer is 18
6 multiples of the number 18 we find one of
so the answer is 18