Sequences questions reward recognising structure fast: is this arithmetic, geometric, or a recurrence wearing a disguise? Expect nth-term and sum formulae, combined sequences, convergence intuition for infinite geometric series (|r| < 1), and sigma notation used as compact bookkeeping rather than deep theory.
Traps include off-by-one indexing (first term vs term zero), confusing the sum formula pair for AP and GP, and misreading convergence conditions. Write out the first three terms explicitly before reaching for a formula — thirty seconds of concrete terms prevents most errors.
Study method: attempt five timed questions, log every miss with its topic code, redo misses from scratch within 48 hours, then re-attempt the topic a week later. Pair each hub with its drill link below and a fortnightly full mock.
Place this topic in the wider test with the syllabus checklist and Paper 1 vs Paper 2, learn the timing system in how to prepare, and check what scores mean in scores explained.