10 popular programming puzzle sites

Here are the top 10 popular programming puzzle sites that will help test your thinking and improve your programming, problem solving, and logical thinking skills.

1. Programming Praxis

2. CodeKata

3. TopCoder

4. Project Euler

5. Facebook Engineering Puzzles

6. Python Challenge

7. Al Zimmermann’s Programming Contests

8. Ruby Quiz

9. C Puzzles

10. 99 Prolog Problems