Easy question, but:
Why on earth is this worth 2 points? Surely the ability to answer "which of these 4 numbers do you get when you multiply three by the number which is one less than thirteen and then add one to the result" isn't worth two points? Like thava and toreador, that's the question I answered and got two points for. I am horrified by the idea that someone who regards themselves as DBA or as an SQL developer couldn't read the code and see that that was the question. Is it perhaps two points because it is difficult for some people to see that the SQL code amounts to that for the arithmetic sequence, at the same time as noticing that the four answer options have 4 different answers to that question?
I don't believe steve.jacobs' comment that the matter of the question is covered in grade school at grade 2. Grade 2 kids are not taught to read procedural SQL Code, are they? If they are, let's hang the teachers, because that's an offence almost as foul as teaching Basic (Dijkstra had something to say on that topic, and everyone who understood software agreed with him).