Question

milton purchases a 5 gallon aquarium for his bedroom.to fill the aquarium with water, he uses a container with capacity of 1 quart.how many times will milton fill and empty the container before the aquarium is full?

Answer 1

First, you would need to know that 4 quarts is in a gallon. 
5 times 4 is 20 quarts.
Milton will need to fill and empty the container 20 times.