What is the difference between the Drill and Problem Sets in the syllabus? For example, under Most Strongly Supported Questions, there is "Drill - MSS Questions" and 12 "Most Strongly Supported Problem Sets". They both seem to have 5 questions, but there is always one drill section and multiple problem set sections.

Also, does everyone get the same questions in the drills and problem sets? Or it's a random assortment of questions each time you take it?