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Real Cambridge past-paper questions by topic, ranked by six years of exam data, with every mark in the official scheme explained.
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2,492
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23
IGCSE & O Level subjects
2020–25
every topic tagged
Steven’s Explanation
Maths 0580 · ON25_13 Q8 · 7 marks
What the mark scheme says
M1 for 180 − 108 oe
A1 nfww
B1dep for correct method seen
What Steven says
A method mark. You get it for subtracting the interior angle from 180°, even if the arithmetic slips afterwards.
nfwwmeans “not from wrong working”: this mark only comes if the working above it is right.
Steven explains the official scheme. He never invents an answer of his own.What do these codes mean? →
Mathematics — the topics that come up most
Ranked by total marks across real 2020–2025 past papers.
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Every marking scheme, explained in plain English
Cambridge writes mark schemes for examiners, not students — M1 B1dep oe nfww. Steven is the IGCSE marking-scheme AI helper: he reads the real scheme for that exact question and shows where every mark is earned — and what loses it.
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Where the marks went, before your paper
Before each paper, we take the examiners’ report on a real exam and go through the questions where students lost marks: what the examiner saw, the trap, then the mark scheme, one mark at a time.
- Real questions from the June 2025 papers, flagged by the examiners' report
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- Maths 0580, Additional Maths 0606 and Physics 0625, in exam-date order
One question, three steps
Where the marks went
- 1
What the examiner saw
The real report on this exact paper
- 2
The trap
The wrong answer most people wrote, and why
- 3
Mark by mark
Each mark earned in order, M1, A1, B1
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