Avoid a paywall and have fun with Math and Computing by answering Project Euler problems. Once you solve a problem you can see discussions about it, and people

Avoid a paywall and have fun with Math and Computing by answering Project Euler problems. Once you solve a problem you can see discussions about it, and people usually post their solutions in various languages. It can be inspiring and insightful to see what elegant solutions can be created. https://projecteuler.net https://projecteuler.net