Hello i am still a beginner,I dont understand something about this app am i suppose to solve most of these complex random challenge quizzes using my head?also why is the time limit so low?why am i pitted against silver ranks pros?
Please disable the Accept Challenge option in Challenge Setting for now.
Some of them are just brain teaser, not demonstrating good programming practice.
Focus on learning.
You can try Code Coach problem, they are good for practice.