Our reworked predictions for both Paper 3 options. Every question comes with the reasons we chose it, a plan, the concepts and examples to know, practice exercises and links to the rest of the site.
We rebuilt our Paper 3 picks from the full 2019 to 2025 question history, with three rules. First, the new picks copy the style of the most recent papers: short, direct propositions like those set in 2024 and 2025. Second, we weighted topics by recency: anything examined in 2025 is treated as very unlikely to return, 2024 topics as unlikely, and so on back through the years, so the longer a central topic has waited, the higher it climbs. Third, where two topics were equally credible, we picked the one that is most worth revising anyway, because its material transfers to the widest range of possible questions.
The questions we now rate less likely have not been deleted. They sit in an "also possible" section at the bottom of each page, with the reason for the downgrade, and their full packs are still open for practice.