All of the practice exams are collected together in one BIG workbook. It prints nicely as an A5 stapled booklet. Exactly the same questions are in the greenbook, which has all of the white space removed to save trees.
The individual exam files are on the sub-pages.
Please let me know if you find any errors.
It's just the one exam and solutions for now:
Yearly competition, run all over the country. If there isn't a venue in your region, suggest a local school becomes a host!