Hi Anithaneeli, I appreciate your interest in problem solving. May I know which programming language are you currently working with? I will certainly give you some links, where you can find lot of questions which are little challenging and will improve your problem solving skills. By the way, how skilled are you with the current language? There are various difficulty level problem, that is the reason why I am asking this question to you. I have searched the web and come up with the best sites to find practice problems, they are

• Programming Praxis.
• HackerRank.
• CodeKata.
• TopCoder.
• Project Euler.
• Facebook Engineering Puzzles.
• Python Challenge.
• Al Zimmermann's Programming Contests.
• Ruby Quiz.

Not only these sites, there are numerous sites available for practice problems. I have picked the top ones. Take sometime, decide which one suits you and start working in it. I have personally used HackerRank only. It is very challenging and you can solve problems with whatever language you choose with.

Hope this was helpful. Thank you. Stay safe.