Fully worked model solutions for the 2025 O-Level A-Math Paper 1 examination paper, hand-written by Mr Alvin Yeo of The Annexe Project. Every method step is shown in the format the Cambridge marking scheme rewards, so students can check not just the final answer but the working that earns the marks. The companion Paper 2 solutions are also free.
These suggested solutions were prepared by Mr Alvin Yeo, principal tutor at The Annexe Project. Each question is fully worked and presented clearly, following the structure expected in the O-Level A Math examination.
This material is part of the learning support provided through O-Level A Math tuition at The Annexe Project. Students are encouraged to complete the paper independently before referring to the solutions. Solutions to Paper 2 are also available.
While care has been taken to ensure accuracy, Mr Alvin Yeo does not accept liability for any errors.
How to use these solutions
Attempt the paper first, timed. The real paper allows 2 h 15 min · 90 marks. Mark what you can before looking.
Compare the working, not just the answer. Method marks are where most O-Level and A-Level candidates lose their grade; each line here is a mark-bearing step.
Redo the questions you got wrong a week later, without the solution open. If a topic keeps failing, that is the topic to bring to a consultation.
Need the formulas? See the O-Level maths formula sheet (what is given in the paper and what must be memorised).
