Added README files

README.md

@@ -0,0 +1,5 @@
+## Project Euler Solutions
+
+This repository contains my solutions to the [Project Euler problems](https://projecteuler.net/archives), written - to the best of my abilities - in 32-bit ARM Assembly.
+
+The Assembly code was written and tested on a Raspberry Pi 3B, and contains C code to facilitate formatted input and output.

mult3or5/README.md

@@ -0,0 +1,3 @@
+## Multiples of 3 or 5
+
+This directory contains my solution to the ['Multiples of 3 or 5' problem](https://projecteuler.net/problem=1).