Problem:
Wanda, Darren, Beatrice, and Chi are tutors in the school math lab. Their schedule is as follows: Darren works every third school day, Wanda works every fourth school day, Beatrice works every sixth school day, and Chi works every seventh school day. Today they are all working in the math lab. In how many school days from today will they next be together tutoring in the lab?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
The number of school days until they will next be together is the least common multiple of , and , which is .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions