1. Given a number, print out an English representation i.e. 425 would result in "Four hundred and twenty five"
2. Given a number, print out the Roman numeral equivalent i.e. 425 -> CDXXV (but there was some maximum limit to what number you'd be given).
3. The reverse of 2 i.e. given a Roman numeral, print out the decimal number (again, there's a maximum limit).
Pretty simple stuff. Bonus points for writing unit tests (though they won't tell you that). They tell you to explain anything you wish in a readme file, but none of the developers reviewing your solution will actually open it.
I believe you have about 7 hours to complete the test.