What's the last number?
Had a wonderful little conversation with my 8-year-old nephew while driving around running errands today. Somehow we started talking about numbers, and he mentioned ‘infinity’ without really knowing what it meant. We got into a whole debate about what ‘the last number’ is, wherein I kept pointing out that you could always just add one to that number and get a new ‘last number.’
It was great to listen to him puzzle it all out. Over the course of the conversation, we touched on Pi, negative numbers, the concept of zero (‘is zero the first number or is one the first number?’), and even verged on modular arithmetic and how computers can only count a finite set of numbers.