Here are all the individual MAT, AEA and UKMT Senior Challenge questions separated and arranged by approximate topics that they cover.
Please use links above to respective wesbites for answers, markschemes and examiners notes.
|MAT website materials
|Warwick Uni archive of AEA solutions
|UKMT website materials
|Question index as Excel file
|Advanced Problems in Mathematics (By STC Siklos)
|Advanced Problems in Core Mathematics (By Stephen Siklos)