Paper Anatomy

WMA12 is 1 hour 30 minutes for 75 marks, with no choice of question. The spec's own Assessment information for this unit states it plainly (P2.2, Issue 3, April 2019, p.17): "The assessment is 1 hour and 30 minutes... The assessment is out of 75 marks... Students must answer all questions." There is no Section A/B/C structure of the kind WEC13 and WBS13 have — WMA12 is one flat sequence of compulsory questions, each carrying its own mark tariff, confirmed directly on every real question paper reviewed this session by the literal closing line "TOTAL FOR PAPER IS 75 MARKS". 90 minutes over 75 marks works out to 1.2 minutes, 72 seconds, per mark on average across the whole paper — real arithmetic, not an invented figure, and a genuinely useful planning number. It is not, on its own, a plan: a question worth 4 marks and a question worth 11 marks both draw from the same 72-second-per-mark budget, but the 11-mark question earns almost three times the pacing allowance the 4-mark one does, so the actual skill is reading each question's own printed mark allocation and budgeting against THAT number, not applying the flat average blindly question by question.

How those 75 marks are actually spread across the paper is not fixed by the spec, and two complete real series checked directly this session show real, different shapes rather than one fixed template. January 2021 (WMA12/01) splits its 75 marks across 10 questions as 6, 7, 8, 8, 4, 8, 6, 7, 10, 11 — a spread from 4 marks (its lightest question) to 11 (its heaviest), a 2.75x range. January 2024 (WMA12/01) also has 10 questions, but a genuinely different shape: 3, 3, 6, 9, 8, 8, 9, 6, 14, 9 — a spread from 3 marks up to 14, a much wider 4.7x range, with two questions worth only 3 marks each sitting alongside one worth almost a fifth of the entire paper. Both sequences are counted directly off each series' own real question-paper PDF and independently sum to exactly 75. Nothing about either series' shape generalises safely to the next one: a student who has only ever practised on a paper with a gentle 4-to-11 spread should not assume every real series is that forgiving.

WMA12 is marked entirely in M, A and B lines — the same three-code system this course's own MarkLine type already models — never in AO1/AO2/AO3 percentages. Verbatim, from the General Marking Guidance printed at the front of every WMA12 mark scheme reviewed this session (January 2021 and January 2024, identical wording in both): 'M marks: Method marks are awarded for "knowing a method and attempting to apply it", unless otherwise indicated'; 'A marks: Accuracy marks can only be awarded if the relevant method (M) marks have been earned'; 'B marks are unconditional accuracy marks (independent of M marks)'; and, printed directly alongside those three definitions in both series checked, a fourth, easy-to-miss instruction: 'Marks should not be subdivided.' Genuinely checked, not assumed from a sibling paper: neither real mark scheme read this session labels a single mark AO1, AO2 or AO3 anywhere, on any question type — every one is M, A, B, or a dependent variant of the three (M1 dep, A1 ft), exactly the vocabulary WMA13's own paper-anatomy page independently found true for P3.

A real worked example, re-verified directly against the primary mark scheme and examiner report a third time this session: WMA12/01 January 2021, Question 2, 7 of the paper's 75 marks (4 for locating a curve's stationary points, 3 for justifying their nature). The real mark scheme splits part (a) as M1 (differentiate) A1 (correct derivative), then a plain, INDEPENDENT M1 — not a mark dependent on the one before it — for setting that derivative equal to zero and solving the resulting quadratic, then A1 for the correct x-values; a genuinely wrong derivative still leaves the solving-the-quadratic method mark available on the candidate's OWN (wrong) quadratic. Part (b) splits differently: M1 for finding the second derivative, then a dependent dM1 for substituting just ONE of the two x-values already found into it and drawing a consistent conclusion, then a final A1 for correct values and conclusions at BOTH stationary points. The real examiner report for this series records two distinct, quotable failure patterns on this exact question. On part (a): candidates "often went on to do unnecessary work by finding the y coordinates of the stationary points or assumed this was what was required of part (b)" — real time spent on a coordinate the question never asked for. On part (b): "there were many who did not then substitute the values for x found in part (a) into their second derivative," with "only 50% scored" the mark that depends on that one substitution — a correct second derivative, sitting on the page, that never turned into an actual answer because no specific number was ever put into it.

A second real finding, new to this course, re-extracted directly from the primary mark scheme and examiner report this session: WMA12/01 January 2024, Question 5(i), 3 of that question's 8 marks (B1 for identifying the series' common ratio, M1 A1 for applying the sum-to-infinity formula correctly). The real examiner report is direct about what went wrong: "Many candidates correctly used the sum to infinity formula, however a number resorted to using the summation button on their calculator which, even if 2 was found, no marks were scored." A second, separate error on the same item: "Those who did attempt the sum to infinity often used a = 6 instead of a = 1.5 in the sum to infinity formula" — misidentifying which term is the series' actual first term once it had already been re-expressed earlier in the question. Both errors connect to the same general rule, verbatim from the same series' own General Principles for Pure Mathematics Marking: 'Where a method involves using a formula that has been learnt... the formula should be quoted first... Where the formula is not quoted, the method mark can be gained by implication from correct working with values, but may be lost if there is any mistake in the working.' A calculator's own correct number, with no formula written down and no working behind it, is invisible to a mark scheme built entirely from M/A/B lines: there is no method on the page for an M mark to reward, whatever the calculator's own display says.

Two further real, checked rules worth carrying into every question, not just the flagged ones. The misreading rule, verbatim: 'For misreading which does not alter the character of a question or materially simplify it, deduct two from any A or B marks gained, in that part of the question affected' — misreading a question is not automatically fatal, but it is not free either. And the paper's own rubric occasionally says the quiet part out loud, directly on the question paper itself, on specific flagged questions: 'In this question you must show all stages of your working' (confirmed directly on real papers spanning January 2020 through October 2024) is sometimes paired with 'Solutions relying entirely on calculator technology are not acceptable' (confirmed directly on June 2023 and October 2024 papers), and a related but distinct phrasing, 'In this question you must show detailed reasoning,' appears on at least two other real questions (January 2021 Q10, October 2024 Q9). These are not decorative — they are Pearson naming, on the paper itself, the exact discipline the January 2024 Q5(i) finding above shows real candidates failing without that warning.