The three numbers correspond to (a) the average mark of all applicants (b) the average mark of shortlisted applicants and (c) the average mark of successful applicants. 2013 is a toughie!
You can now interactively access all papers back to 2001 via the DFM Homework Platform. Click here to access this database.
The Maths Aptitude test is used by Oxford and Imperial universities as part of their admissions process. Here is a bare bones syllabus for the MAT provided by Oxford: Syllabus
Worksheets for practising certain topic-based skills for the Maths Aptitude Test, particularly for Section A.
Advice on answers Section B questions on the Maths Aptitude Test.
Lots of past paper questions with solutions and tips, divided up by topic.
I produced these the evening students took the 2015 paper! (after a Tiffin student requested them)