SudoStudy
SudoStudy
Built by ex-Google engineers
For O Level, IGCSE, GCSE and A Level students

Do past papers online.
Get marked like an examiner, in seconds.

SudoStudy has 100,000+ real CIE, AQA and Edexcel questions. Type your answer or photograph your working, and it is scored against the official mark scheme — showing exactly which marks you got, which you missed, and why.

90%

of students who practise on SudoStudy improve by at least one grade.

Are you a teacher? Mark a whole class in minutes →

CIE A-Level · Physics 9702 · Paper 4
[4 marks]

3. Sketch the I–V characteristic of a filament lamp and explain its shape.

Your answer
Type your answer — or photograph your working…
Photo of your diagram
Check my answer
Submit to see your mark-scheme breakdown.

No more PDFs

Past papers, digital. Marked for you.

Stop printing papers and checking your own answers against a PDF mark scheme. Sit every paper on screen and get it marked instantly.

On paper
Print it. Mark it yourself.
PAST PAPER · PDF
−1

Slow, manual, and easy to miss a mark.

On SudoStudy
Answer on screen. Marked in seconds.
CIE Physics · Paper 4
Q3. Why does a metal object feel colder than wood?
Submit for marking

One screen. Every paper. Instant mark-scheme feedback.

Practice mode

SudoStudy replaces your topicals.

Every question you practise is tracked — so you can see exactly which topics you've mastered and which still need work. No revision book can do that.

Topical revision books
One book per topic.
Mechanics
Waves
Electricity
Thermal
Atomic

Static. No feedback. No idea what you've actually mastered.

SudoStudy practice mode
Your topic mastery
PredictedC
MechanicsA · 82%
ElectricityB · 74%
WavesC · 68%
AtomicD · 59%
ThermalE · 46%

Every question is tracked — so you always know what to revise next.

Instant AI feedback

See exactly where the marks went.

Not just a tick or a cross — you see exactly which marks you got, which you missed, and how to get them next time.

AQA A-Level · Physics 7408
Practice question · 4 marks

4. Explain why the resistance of a metal wire increases as its temperature rises. [4]

Student response

As the wire heats up, the metal ions vibrate more. The electrons collide with them more often as they move through the wire, so the current falls for the same potential difference.

Mark scheme breakdown
3 / 4 marks
✓
M1Awarded
Lattice ions vibrate with greater amplitude as temperature rises
✓
A1Awarded
Electrons collide with the ions more frequently
✓
B1Awarded
Drift velocity falls, so current drops for the same p.d.
−
A1Not awarded
Links to R = V / I to conclude resistance increases
Next step: Add the final link — since R = V / I and the current falls at constant p.d., the resistance must rise — to claim the last mark.

Past paper bank

Every board. Every subject. Every year.

If it's in the syllabus, it's in here.

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AQA GCSE / A-Level
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Edexcel GCSE / A-Level
MathematicsPhysicsChemistryBiologyBusinessEconomicsGeographyHistory

Missing a board you need? Email us and we'll digitise it.

Trusted by students and teachers worldwide

Thousands of students use SudoStudy to practise real past papers, get instant feedback, and push their grades up.

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What people say

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Every quote is a public, verified review from a teacher or student. Nothing invented.

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Verified review
SudoStudy completely changed how I revise
I used to spend hours trying to find the right past papers or come up with my own practice questions. Since using SudoStudy, revision has become so much easier and actually fun. I love how you can pick topics and generate quizzes based on what you need to work on.
T
Tyler
Student · United Kingdom
Verified review
Automatic answer checking is the best feature!
A great resource for practicing O/A level MCQs. The best part; it automatically checks your answers, and explains both why you got the answer correct or wrong! It's a tool that holistically shows areas requiring improvement.
AN
Alina Naveed
Student · Switzerland
Verified review
The best full package!
As a teacher, this is hands down the best full package. With the ability to create quizzes of the desired topics, filtering questions through difficulty levels and explanations, it has just made everything so convenient for me! The real time insights on student performance is another great feature.
HR
Huda Rehman
Teacher · Pakistan
Verified review
An important part of my A-Level preparation
It's an amazing platform to practice for my A-Level exams. The ability to generate customized quizzes based on specific topics & subtopics is really useful. Also, the question explanations provided helped me understand tough A-level MCQs.
ZA
Zeeshan Alam Khan
Student · Pakistan
Verified review
By far the best practicing tool!
The website is unlike any other practice tool. I am so glad I found this before my exams — it has definitely helped me boost my grades.
HR
Hamna Rehman
Student · Pakistan
Verified review
I wish I could have found this app sooner
I stumbled upon this when trying to figure out how to revise my A-levels courses. Since then my grades have significantly seen a rise.
KK
Kamal Kakaam
Student · Pakistan

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For students

Walk into the exam
already knowing your mark.

Practise on real past papers, get marked like an examiner in seconds, and fix the gaps while there is still time. Free to start.

FAQ

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How the marking works, what you can practise and what it costs.

Still have questions?

Email us and a real person replies, usually within a few hours.

What kinds of questions can I practise?
Both multiple-choice and written (long-answer) questions. Your written answers are marked by AI against the real CIE, AQA, and Edexcel mark schemes — point by point, just like an examiner.
Can I type my answer or upload a photo of my working?
Both. Type your answer, or snap a photo of your handwritten working and diagrams — SudoStudy reads it and marks it against the mark scheme.
Do I get to see where I lost marks?
Yes. After every question you see exactly which marks you got, which you missed, and how to pick them up next time — so you actually learn from each attempt.
Can my teacher set quizzes for me?
Yes. Once your teacher signs up, they can build quizzes and send them to you with a single link. You do them online and your results go straight back to them.
Is SudoStudy a teaching platform?
It's a practice and assessment tool — not a replacement for your lessons. Use it alongside class, daily or weekly, to practise past-paper questions, get instant feedback, and push your grades up.
How do I give feedback or request a feature?
Drop your ideas at feedback.sudostudy.com — we read every one and keep you posted on the status.

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