Congrats! According to their rules you have to (a) submit to us valid proof of identity, age, residence and employment; (b) correctly answer, unaided by any other person, a time-limited, mathematical, skill-testing question during a pre-arranged, mutually convenient telephone call; (c) and fully comply with the contest rules.
Do you know what kind of math skill question it is? And why would they need proof of employment? It seems like none of their business and they want to sell you something.