Question

How many different keys can be made for a lock that has 5 tumblers with 5 possible heights each? (consecutive tumblers have different heights)

Answer 1

what kinda lock is that? :O

Answer 2

There are five possible heights for each tumblers, and there are five tumblers, so you have \(5\times5\times5\times5\times5=5^5 = \boxed{3125~keys}\)

Answer 3

I tried that answer already but it said it was incorrect.