Question

Mr. Chen goes to the post office to buy small and large boxes. The post office has 10 small boxes and 9 large boxes in stock. He needs at least 4 boxes in each size. Mr. Chen will buy 15 boxes at most. Mr. Chen buys 9 small boxes. How many large boxes could he buy?

Answer 1

Answer: He could buy 6 large boxes.

Explanation:

15-9=6

Answer 2

he could by more than 6 boxes.