I encourage you to take part in August Easy contest hosted by HackerEarth, for which I am the tester. There are over 1400 participants already registered, so you also cannot miss it.
Problems are fun to solve and there will be six of them, covering different categories. I have given some hints on what skills they require to be solved here:
http://chasethered.com/2015/07/hackerearth-august-easy-subscriptions-to-blog-enabled/
Check it out and see you on leaderboards!