I chose C because it depends how much money the school has. So it wouldn’t be 5 or 12, because we don’t know how much money the school has to buy how many basketballs. Tell me if I’m wrong.
Answer: Factors of 400 = 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200 and 400. Factors of 401 = 1 and 401. Hence, the common factor of 400 and 401 is 1.
