Question

A vendor has 40 quarts of lemonade to sell. He has 12 containers. Some of the containers hold 4 quarts and some hold 2 quarts. How many of each does he have?

Answer 1

Not being a math teacher, I resorted to trial-and-error -- and found that the vendor needs twice as many 4-quart containers as 2-quart containers.

Answer 2

there will be 8 four quart containers and 4 two quart containers that will eqeal 12 containers and uses all 40 quarts