The 12-question diagnostic finds your weak areas; this maps them precisely. Forty questions across every area and difficulty tier, with no countdown pressure — because here we’re measuring two things separately: what you get wrong (method gaps) and what you get right but slowly (fluency gaps). They need different training, and this is what tells them apart.
When you finish: a per-area map of accuracy and pace, every worked solution — and your mastery map, daily sessions and plan sharpen automatically from the results. Best taken once when you go premium, and again a week before your test.