This challenge though does not have any resemblance with the real time problem directly, but it measures about logical thinking. The problem is all about finding the factorial of numbers

This challenge is to find the date based on year, month, day of the week and weekday number. Say for example, if the question is to find the date of 2nd Sunday of January 2010, the answer should be '2010-01-10'.

The challenge is to find the employees with the second highest salary in each department. However, it is a little more complicated because if two employees have the same salary, you need to list both of them.