Information, resources and past papers for the Mathematics Admissions Test (used for entrance to Maths courses at Oxford University) can be found at the official website. Listed below are links to video solutions I have made to questions from some papers.

2018 Playlist – all questions
2017 Playlist – Short Answer A to J
 2016 Short Answer A to E  2016 Long Answer Q2
 2016 Short Answer F to H  2016 Long Answer Q3
 2016 Short Answer I and J