Lock
Myers, Amy. (2020). Simplex Locks. In S. Bowen (Ed.), Math Circle Activity Database. American Institute of Mathematics. https://mathcircles.org/activity/simplex-locks

Simplex Locks

Contributor(s):
A simplex lock is a type of combination door lock that involves pushing-in buttons. Given the set of rules for using a 5-button simplex lock, how many different combinations are there?

Activity Guide

This guide looks at the activity in detail and goes into the underlying math.