In simple terms
A friendly intro before the formal notes — no formulas yet.
Cracking the Paper 1 Code
Paper 1 tests your breadth of knowledge across the entire syllabus with quick-fire questions. Success comes from a mix of knowing the content and having a smart strategy to navigate the exam efficiently.
Think of Paper 1 like a design sprint or a rapid prototyping challenge. You don't have time to build a perfect, polished final product for each question; you need to quickly identify the core problem, eliminate unworkable ideas (distractors), and select the most viable solution based on your knowledge and constraints (time).
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First Pass - The Quick Wins: Go through the entire paper and answer all the questions you are immediately confident about. This builds momentum and banks easy marks.
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Second Pass - The Educated Guess: Return to the questions you skipped. Carefully read the question, identify keywords, and use the process of elimination to discard obviously incorrect answers.
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Third Pass - The Calculation Check: Tackle the questions requiring calculations. Write down your working clearly to avoid simple errors and double-check your units and final answer against the options.
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Final Review - The Sanity Check: Use any remaining time to review your answers, especially those you were unsure about. Ensure you haven't made any careless mistakes like misreading a question.
Explore the concept
Use the live diagram and synced steps — play it or tap a step card to walk through.
Full topic notes
Formal explanation with the rigour you need for the exam.
The Anatomy of a Multiple-Choice Question
Every multiple-choice question is carefully constructed. Understanding its parts helps you to deconstruct it effectively. The 'stem' is the question itself. It's followed by several 'options', typically four. One of these is the correct answer, known as the 'key'. The other incorrect options are called 'distractors', which are deliberately written to seem plausible and catch common mistakes.
Stem: The part that asks the question or presents the problem.
Options: The possible answers provided.
Key: The single correct answer.
Distractors: The incorrect but plausible options.
Strategic Approaches to Answering
Do not simply work through the paper from question 1 to 40 in order. A multi-pass strategy is far more effective for managing time and maximising your score. On your first pass, answer only the questions you know immediately. This builds confidence and secures easy marks. On your second pass, return to the skipped questions and apply the process of elimination. By ruling out answers you know are wrong, you significantly increase your chance of guessing correctly from the remaining options.
Tackling Calculation Questions
A significant portion of Paper 1 involves calculations related to mechanics, materials, and energy. These questions are a common source of lost marks, often due to simple errors rather than a lack of knowledge. Always write down the formula, convert all values to standard SI units (metres, kilograms, seconds, etc.) before you calculate, and show your working on the question paper. Distractors are often based on common mistakes, such as forgetting to convert units or using the radius instead of the diameter.
Worked examples
See the formulas applied — reveal one step at a time, like the exam.
A designer is conducting market research for a new ergonomic office chair. Which of the following methods would generate quantitative data? A. A focus group discussing comfort and aesthetics. B. An online survey asking users to rate back support on a scale of 1 to 5. C. One-on-one interviews asking for opinions on the chair's features. D. Observing users' posture and body language while they use the chair.
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Identify Keywords: The stem asks for a method that generates 'quantitative data'. This means numerical, measurable data.
A force of 150 N is applied to a wrench at a distance of 30 cm from the centre of a bolt. What is the moment (torque) applied to the bolt? A. 4.5 Nm B. 45 Nm C. 450 Nm D. 4500 Nm
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Identify Formula: The formula for moment (or torque) is: Moment = Force × Perpendicular Distance.
How it all connects
The big idea sits in the middle — tap a linked idea to explore the link.
Tap a linked idea to see how it connects back to the main topic — that connection is what examiners reward.
Glossary
Try to recall each definition before you reveal it.
Quick check
Answer in your head first — then tap to check. No pressure.
Revision flashcards
Flip the card. Test yourself before the exam.
What is a 'distractor' in a multiple-choice question?
An incorrect option designed to seem plausible. It often reflects a common misconception, a calculation error (like a misplaced decimal), or a misinterpretation of the question's keywords.
Key takeaways
Review these before you close the topic — retrieval beats re-reading.
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Stem: The part that asks the question or presents the problem.
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Options: The possible answers provided.
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Key: The single correct answer.
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Distractors: The incorrect but plausible options.
Practice — then mark it
The whole point: a real Cambridge question, marked mark-by-mark.
Test Your Technique on Paper 1 Questions
Test Your Technique on Paper 1 Questions
Extra simulations & links
PhET, GeoGebra and other curated tools — open in a new tab.
Frequently asked
Checkpoint
One marked question is worth ten re-reads — close the loop before you move on.
Reading it isn’t knowing it — prove it.
Before you move on: do Test Your Technique on Paper 1 Questions on paper, snap a photo, and get examiner-style feedback on exactly where you win and lose marks.