In how many days will they be together on the menu again?

Question

The school cafeteria serves pizza every with day and applesauce every eighth day. Suppose that piuzza and applesauce are on today's menu. In how many days will they be together on the menu again?

Answer 1

Let's assume that you meant that pizza is served every fifth day.

 

The Least Common Multiple (LCM) of 5 and 8 is 40.  It will be 40 school days from today before they are served together again.

Answer 2

Assuming that they are both served every eighth school day, the next time shall be in 10 (8 + Sat & Sun) days.