I have fewer than 30 marbled

Question

I can put them equally into 2 groups 6 groups or 9 groups how many marbles do I have

Answer 1

What is the LCM of 2, 6, and 9 ?

Answer 2

I will not tell you the answer. Think about it. What number can be divided by both 2, 6, and 9 and is less than 30. I"ll only tell you that it is less than 20 but greater than 10.