Summation of series: past paper questions
Real questions on summation of series
The newest 20 of 165 written questions. Open one to see it on the real paper.
- 9231/12 · October/November 2025 · Q1a[3]
3-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · October/November 2025 · Q1b[5]
5-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · October/November 2025 · Q1c[1]
1-mark “Deduce” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · October/November 2025 · Q7b[3]
3-mark “Find” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · October/November 2025 · Q1a[3]
3-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · October/November 2025 · Q1b[5]
5-mark “Show” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · October/November 2025 · Q1c[1]
1-mark “Deduce” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/21 · October/November 2025 · Q8a[1]
1-mark “State” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/22 · October/November 2025 · Q6d[1]
1-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/23 · October/November 2025 · Q2c[2]
2-mark “Find” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/23 · October/November 2025 · Q8a[1]
1-mark “State” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/11 · May/June 2025 · Q1a[3]
3-mark “Use” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/11 · May/June 2025 · Q1b[4]
4-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/11 · May/June 2025 · Q1c[1]
1-mark “Deduce” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · May/June 2025 · Q1a[3]
3-mark “Use” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · May/June 2025 · Q1b[4]
4-mark question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/12 · May/June 2025 · Q1c[1]
1-mark “Deduce” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · May/June 2025 · Q3c[5]
5-mark “Use” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · May/June 2025 · Q4a[2]
2-mark “Show” question — its maths and diagrams are best seen on the paper.
See it on the paper → - 9231/13 · May/June 2025 · Q4b[3]
3-mark question — its maths and diagrams are best seen on the paper.
See it on the paper →
What examiners said
Good solutions derived the result ( r + 1) − r 2 = 2r + 1 and then showed clearly the summation of both sides to work to the known result. Weaker candidates summed the left-hand side using the n method of differences but struggled to link this to r . r =1
— Examiner report, October/November 2023, 9231/11 Q1(a) (Cambridge)
This was often well done, with the majority of errors being in the algebra or not simplifying the final result.
— Examiner report, October/November 2023, 9231/11 Q1(b) (Cambridge)
This was usually well done, with only a few making errors in expanding the brackets and collecting like terms.
— Examiner report, October/November 2023, 9231/12 Q1(a) (Cambridge)
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