Book 7: Problem Challenge 5-Year Competition Book 2020 - 2025 (including Final Challenge)

The seventh competition book is similar to Books 3 to 6 and features all 125 problems from 2020 to 2025, together with the corresponding questions from the Final Challenge competition (except for the year 2021 when this part of the competiotion did not run). It features coloured illustrations, full solutions and analysis, and ideas for extension work. Another 105 pages of problem solving!