Unit 1: on 32 of 32 papers, 3–29 marks a paper (13 on average)
Read question by question: blind checks found 117 of 120 question parts tagged with the right topic (95% confidence interval 92.9–99.1%). “needs (a)” names an earlier part the listed parts build on, so a question can be worked through whole.
Unit 1 · January 2023 · Q4 (a(i), a(ii), a(iii), a(iv), b(i), b(ii), b(iii)) · 9 marks, Q7 (b, c(i), c(iii)) · 10 marks — question paper and mark scheme
Unit 1 · October 2022 · Q2 (a, b(i), b(ii), c(ii)) · 6 marks · needs (c(i)), Q3 (a, b, c) · 7 marks — question paper and mark scheme
Unit 1 · January 2022 · Q2 (a(i), a(ii), b(i), b(ii)) · 7 marks, Q5 (a(ii), b) · 8 marks, Q8 (c(i), c(ii), c(iv)) · 7 marks — question paper and mark scheme
Unit 1 · October 2021 · Q3 (a, b, c) · 9 marks, Q4 (b(i), b(ii)) · 4 marks — question paper and mark scheme
Unit 1 · June 2019 · Q2 (a, b, c) · 8 marks, Q7 (a(i), a(ii), a(iii), b(i), b(ii)) · 12 marks — question paper and mark scheme
Unit 1 · January 2019 · Q4 (a, b(i), b(ii), c) · 11 marks, Q8 (c) · 6 marks — question paper and mark scheme
Unit 1 · January 2019 · Q2 (a(i), a(ii), a(iii), b, c) · 8 marks, Q3 (a(i), a(ii), b) · 5 marks, Q7 (b(i), b(ii)) · 4 marks — question paper and mark scheme