The SAT is a standardized test that A lot of high school children have had a hard time dealing with. All students have subjects that they are very good at, and others not so good and need a bit more practice on. This article talks about the last two questions that will be on your test and how they will be grouped together. The key to understanding these problems are to understand the variables at hand. I think that a lot of students get test anxiety and let this test psych them out, when in all honestly they could probably to very well on it.
Read more: The Last Two Problems on the SAT