Math
posted by Kelly .
I don't know if I suppose to do LCM or other?I'm going to need help.
Beyonce visits her parents every 6 days and JayZ vists his parents every 9 days. When will it be the first day they visit there parents on the same day?

find the LCM

What is LCM?

LCM = least common multiple
http://www.math.com/school/subject1/lessons/S1U3L3GL.html