Laura goes to the grocery store every 5 days and Tim goes to the same grocery store every 6 days. If Laura and Tim both went to the grocery store today, when is the next time they will both go to the grocery store on the same day?
To solve this problem, you must find the least common multiple of 5 and 6, which is the smallest multiple common to both numbers. To do this, make a list of multiples for each number until at least two multiples are on both lists. 5: 5, 10, 15, 20, 25, 30… 6: 6, 12, 18, 24, 30… The lowest common multiple of both numbers is 30.