How to get an A or A* in Cambridge O Level Mathematics D (4024)

Find the prerequisite behind each difficult topic

Before tackling a difficult trigonometry question, check that you can rearrange an equation, substitute values and handle fractions. A weak prerequisite can make an entire topic feel impossible. Make a short diagnostic covering fractions, indices, percentages, equations and graphs, then identify which errors occur more than once.

Replace a vague target such as “revise algebra” with a visible task: solve six equations involving fractions and explain each rearrangement. Repeat the task with different numbers two days later. Being able to follow a solution is useful; being able to produce it independently is the real checkpoint.

Practise choosing a method

Topic worksheets tell you which tool to use before you begin. Mixed practice removes that help. Take a small selection involving ratio, percentages, geometry and probability. For each question, write a first line explaining the mathematical relationship before calculating anything.

Underline the quantity requested and draw a diagram when it makes relationships clearer. Ask whether your answer should be a length, an area, a probability or a rate. This prevents correct arithmetic from answering the wrong question and makes your working easier to check.

Make calculator and non-calculator sessions different

For non-calculator practice, work on equivalent fractions, exact values, sensible cancellation and efficient written arithmetic. Do not reach for a device when a calculation looks awkward; first look for a factor or a simpler representation.

For calculator practice, rehearse brackets, negative numbers, powers and the required angle mode. Estimate the size of an answer before entering it. Keep intermediate values unrounded and apply the requested accuracy at the end, unless the question explicitly tells you otherwise.

Use mock papers as a feedback system

After each timed paper, sort lost marks into method choice, algebra, arithmetic, interpretation and unfinished work. Pick the two largest categories for your next revision sessions. Copying a complete worked answer can hide the exact point where your reasoning stopped.

Instead, redo the question from a blank page, explain the correction and attempt a nearby variation. Keep a weekly total of repeated error types. A falling number of repeated mistakes is more informative than simply counting how many papers you have completed.

Common mistakes—and how to fix them

Your four-week revision plan

Use this as a focused revision cycle alongside your lessons. If you are still learning the course, give unfamiliar topics more time before attempting full papers.

1. Week 1

   Repair foundations

   • Diagnose fractions, algebra and percentages without notes.
   • Build short daily drills around your two weakest prerequisite skills.
2. Week 2

   Connect topics

   • Alternate geometry and statistics with mixed algebra questions.
   • Explain aloud why each chosen method fits the problem.
3. Week 3

   Practise under time

   • Complete a suitable timed paper using its actual calculator rules.
   • Redo every missed method without looking at your correction.
4. Week 4

   Make performance consistent

   • Attempt fresh mixed questions and a second timed paper.
   • Review recurring errors and practise finishing with a brief accuracy check.

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