I have worked a lot with Westminster Challenge (13+) maths. This page has Westminster Challenge maths papers as well as the solutions I have produced for many of those papers. More will be added as I create them. I encourage students to use these solutions only after having tried the papers extensively on their own first.
Please note that many of these solution sets are not fully-worked, only providing the answer so that it is easy to see whether a student's work is right or wrong. This is because I produced them in order to mark my students' work. I have provided them nonetheless to help students identify where their errors are. Where, having checked the solution, a student is still unsure how to reach it please do contact me if you need more help.
If you spot any errors or omissions on this page please contact me.
The following UKMT book is also useful for Westminster Challenge maths preparation.
Eton King's Scholarship papers are also useful - please see my resource page for that set of exams (which also includes both the papers and my solutions): Eton King's Scholarship.
Westminster Challenge maths papers and (where I have already produced them) solutions