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 Jay-Z 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
To find the first day they will both visit their parents on the same day, you need to find the least common multiple (LCM) of 6 and 9. The LCM is the smallest number that is divisible by both 6 and 9.
Here's how you can find the LCM of 6 and 9:
1. List the multiples of 6: 6, 12, 18, 24, 30, ...
2. List the multiples of 9: 9, 18, 27, 36, 45, ...
3. Look for the smallest number that appears in both lists. In this case, it's 18.
Therefore, the LCM of 6 and 9 is 18. This means that Beyonce and Jay-Z will visit their parents on the same day every 18 days.
Now, to determine when they will first visit their parents on the same day, you need to find the next multiple of 18. Starting from today, you would count in increments of 18 until you reach the next day when they will both visit their parents on the same day.
For example, if today is day 1, you would count: 1, 2, 3, ..., 17, 18. On day 18, Beyonce and Jay-Z would visit their parents on the same day for the first time.
So, the first day they will visit their parents on the same day is day 18.