Andrés, in his shop, stores the buttons in bags. In box A, he has bags of 24 buttons each with no buttons left. In box B, he has
bags of 20 buttons with no buttons left. The number of buttons that are in box A is equal to the number of buttons in box B. What is the minimum number of buttons in each box?
What you are looking for is the least common multiple. List out what the multiples of each number are and when ever you find two numbers that match you have your answer.