UKMT Senior Maths Challenge 2017 Questions 21-25

Here is the third part of the video for the UKMT senior maths challenge 2017 paper. A lot of time and effort goes into making these kind of videos, so I would appreciate if you could subscribe and like the video. For the solutions to questions 1-10 follow the link below    • UKMT Senior Maths Challenge 2017 Questions...   For the solutions to questions 11-20 follow the link below    • UKMT Senior Maths Challenge 2017 Questions...