Geeky number patterns

Now, most of these patterns are pretty straight-forward, but I did want to use what maths knowledge I had to try some more varied stuff. None of it is going to be too challenging to even a moderate mathematician, but hey, I'm a moderate mathematician.

I'd love for you to identify what I've done, and also let me know if I've made any mistakes. If you've any ideas for stuff I can do with my numbers, let me know!

#lettering #finishedart