Question

An algebra class has 20 students and 20 desks. for the sake of variety, students change the seating arrangement each day. how many days must pass before the class must repeat a seating arrangement?

Answer 1

I'm really not sure this is the right answer, but there are 20! ways to arrange 20 students in different orders. 20! is a VERY large number haha but that's how I'd do it :/