"In this challenge, we practice calculating probability. Check out the [Tutorial](https://www.hackerrank.com/challenges/s10-mcq-1/tutorial) tab for a breakdown of ...

"In this challenge, we practice calculating the *mean*, *median*, and *mode*. Check out the [Tutorial](https://www.hackerrank.com/challenges/s10-basic-statistics ...

Want to bypass the whole "send résumé, wait for a call" developer job application process? There's an app for that. The app lets job-seeking engineers request a coding challenge from a participating ...

HackerRank, a new social platform for coders, is launching at TechCrunch Disrupt today. The Y Combinator-backed company, which was founded by the same team as job site InterviewStreet, wants to create ...

HackerRank is a social platform for fun coding challenges that launched at TechCrunch SF Disrupt in 2012. It grew out of Interviewstreet, a technical recruiting platform that’s being used by companies ...