There are 10 types of people:
those who understand ternary those who don't, and those who thought that this joke was about binary … and those who thought this quaternary joke was a ternary joke. … and those who thought this quinary joke was a quaternary joke.
… and those who thought this (n+1)-base joke was a p-base joke (p,n ∈ ℕ; 2≤p≤n).