OCR A Level Further Mathematics B (MEI) (H645)
Exam structure at a glance for OCR A Level Further Mathematics B (MEI): every paper with its time, marks and weighting, plus the facts and links you need.
- Board
- OCR
- Specification code
- H645
- Level
- A level
- First teaching
- 2017
- First exams
- 2019
- Exam papers
- 9
- Last checked
- 2026-10-20
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Papers and weightings
| Paper | Time | Marks | Weight | What it is (our summary) |
|---|---|---|---|---|
| Y420: Core Pure | 2 h 40 min | 144 | 50% | Mandatory pure paper; 144 raw marks scaled to 180. |
| Y421: Mechanics Major (option) | 2 h 15 min | 120 | 33.3% | Major option. |
| Y422: Statistics Major (option) | 2 h 15 min | 120 | 33.3% | Major option. |
| Y431: Mechanics Minor (option) | 1 h 15 min | 60 | 16.7% | Minor option. |
| Y432: Statistics Minor (option) | 1 h 15 min | 60 | 16.7% | Minor option. |
| Y433: Modelling with Algorithms (option) | 1 h 15 min | 60 | 16.7% | Minor option. |
| Y434: Numerical Methods (option) | 1 h 15 min | 60 | 16.7% | Minor option; calculator output alone is not accepted as method. |
| Y435: Extra Pure (option) | 1 h 15 min | 60 | 16.7% | Minor option. |
| Y436: Further Pure with Technology (option) | 1 h 45 min | 60 | 16.7% | Minor option using spreadsheet, graphing, CAS and programming; being withdrawn (last exam June 2028). |
Times are exam lengths; weightings are shares of the whole qualification. Summaries are in our own words.
Routes (30): Y420 + Y421 + Y432; Y420 + Y421 + Y433; Y420 + Y421 + Y434; Y420 + Y421 + Y435; Y420 + Y421 + Y436; Y420 + Y422 + Y431; Y420 + Y422 + Y433; Y420 + Y422 + Y434; Y420 + Y422 + Y435; Y420 + Y422 + Y436; Y420 + Y431 + Y432 + Y433; Y420 + Y431 + Y432 + Y434; Y420 + Y431 + Y432 + Y435; Y420 + Y431 + Y432 + Y436; Y420 + Y431 + Y433 + Y434; Y420 + Y431 + Y433 + Y435; Y420 + Y431 + Y433 + Y436; Y420 + Y431 + Y434 + Y435; Y420 + Y431 + Y434 + Y436; Y420 + Y431 + Y435 + Y436; Y420 + Y432 + Y433 + Y434; Y420 + Y432 + Y433 + Y435; Y420 + Y432 + Y433 + Y436; Y420 + Y432 + Y434 + Y435; Y420 + Y432 + Y434 + Y436; Y420 + Y432 + Y435 + Y436; Y420 + Y433 + Y434 + Y435; Y420 + Y433 + Y434 + Y436; Y420 + Y433 + Y435 + Y436; Y420 + Y434 + Y435 + Y436. Each route adds up to 100%.
Good to know
- Routes: 30 possible combinations of papers; each adds up to 100%.
- Formulae booklet: Separate formulae booklet with statistical tables (spec section 5d).
- Calculators: Scientific or graphical calculator in all papers (JCQ rules); Y436 needs spreadsheet, graphing software, CAS and a programming language on a non-networked device.
- Weightings: Board gives 50%, 33⅓% and 16⅔%; Core Pure 144 raw marks scaled to 180.
- Routes: Route A: Core Pure + Mechanics Major + one minor (not Mechanics Minor). Route B: Core Pure + Statistics Major + one minor (not Statistics Minor). Route C: Core Pure + three minors.
- Dates: First teaching 2017 from the qualification page name; first assessment 2019 from the spec.
- Status: Optional paper Y436 Further Pure with Technology is being withdrawn: final first teaching September 2026, final assessment June 2028.
- AS level: H635 – Separate AS qualification; components not stored yet. (AS marks do not count towards the A level)
Not yet confirmed by us: AS H635 papers not read yet (code only).. Check the official documents.
Key dates
Summer 2027 exam series
- First exam (GCSE and A level): Mon, 10 May 2027
- Contingency day: Wed, 23 June 2027
- Special consideration deadline: Wed, 30 June 2027
A levels are linear: all exams are sat at the end of the two-year course. Source: JCQ key dates June 2027. Check each board's final timetable for paper dates and results day.
Specification, past papers and grade boundaries
- OCR: Specification at a glance (board website)
- OCR: Specification (PDF, board website)
- OCR: Past papers and mark schemes (board website)
- OCR: Grade boundaries (board website)
Facts checked against: ocr.org.uk, ocr.org.uk, ocr.org.uk.
More packs
Exam facts (paper names, times, marks, weightings, codes) are taken from each awarding body's own specification and summarised in our own words; no specification text, papers, mark schemes or booklets are reproduced. Exam details checked against the board's specification on 2026-10-20. Always check the current specification on the board's website.
Contains public sector information licensed under the Open Government Licence v3.0 (Ofqual and DfE pages on GOV.UK). Classfern is not affiliated with or endorsed by the Department for Education, Ofqual, JCQ, AQA, Pearson Edexcel, OCR or WJEC Eduqas.
Questions teachers ask
How long are the OCR A Level Further Mathematics B (MEI) exams?
Y420: 2 h 40 min; Y421: 2 h 15 min; Y422: 2 h 15 min; Y431: 1 h 15 min; Y432: 1 h 15 min; Y433: 1 h 15 min; Y434: 1 h 15 min; Y435: 1 h 15 min; Y436: 1 h 45 min.