GuidesMathsPaper 3 · last-minute revision
3 days to go

GCSE Maths Paper 3: last-minute revision

Paper 3 is your last chance, and that changes the odds. Anything the exam board hasn't tested yet in this sitting is more likely to show up here. Here's your 3-day plan.

AQA 8300, topics apply broadly to Edexcel 1MA1 and OCR J560
The plan

Your 3-day plan

One focus per day, building to a timed run. Work it in order.

3
3 days to go

The topic-gap effect and statistics

  • Think back over Papers 1 and 2. Any major topic you didn't see (circle theorems, vectors, a specific graph type) is a strong candidate for Paper 3
  • Practise box plots and histograms together. Paper 3 regularly asks you to compare two data sets using one or both
  • Revise bearings and how they combine with the cosine or sine rule, a common late-paper pairing
2
2 days to go

Multi-step problem solving

  • Work through compound interest and ratio problems that combine several steps in one question. Paper 3 leans on these more than Papers 1 and 2
  • Practise enlargement with negative and fractional scale factors, a common Higher-tier Paper 3 question
  • Revise speed, distance, time and density together. Both use the same triangle method and often appear back to back
1
1 day to go

Calm consolidation, not cramming

  • Skim your circle theorems and vectors notes one more time in case they haven't come up yet this series
  • Re-check your calculator is set to degrees, and rest your compound interest and ratio methods in your head
  • Sleep well. By Paper 3, the marks you'll gain come from clear thinking under pressure, not new content
Priority order

The topics that come up most

Ranked from analysed past papers. Start at the top: if you run out of time, you will have covered the most-tested ground.

1

Circle Theorems

If circle theorems haven't appeared on Paper 1 or Paper 2 this series, they're a strong Paper 3 candidate, a consistent 4-8 mark topic across every session analysed

2

Box Plots

Appeared on the calculator papers in every session analysed, often as a 3-4 mark comparison question between two data sets

3

Histograms

A recurring statistics topic on the final calculator paper: estimating frequency and drawing bars from frequency density

4

Cosine Rule & Bearings

These two topics are frequently paired on Paper 3: cosine rule to find a distance, bearings to interpret the direction

5

Ratio Problems

Multi-step ratio questions combining sharing, money, and comparison appear consistently on the final paper, worth up to 4 marks

6

Compound Interest

Appeared on Paper 3 in the sessions analysed, worth 3-4 marks, a repeated percentage growth question, often set in a real-world money context

7

Vectors

Higher only. If vectors haven't appeared yet in this series, Paper 3 is where they're most likely to turn up: 4 marks, usually a geometric proof

8

SOH-CAH-TOA

Appeared on Paper 3 in every session we've analysed, a dependable trigonometry topic to revise regardless of what else has already come up

Your Knowledge Organisers

PrepWise has a one-page Knowledge Organiser for every topic above. In the final 3 days, use them the same way each time: cover the page, try to recall the method and a worked example from memory, check what you missed, then repeat the next day.

Open the Maths Knowledge Organisers
Cheat sheet

Exam technique

Rules specific to Paper 3. On this paper, structure earns as many marks as knowledge.

1

Show your working, every time

By Paper 3, you've heard this twice already, and it matters just as much here. A correct method with the wrong final answer still earns marks. A correct answer with no working can lose them. Write every step down, especially in multi-step problems.

2

Use the topic-gap logic, but don't rely on it alone

If a major topic hasn't appeared yet this series, it's a reasonable bet for Paper 3, but the exam board doesn't guarantee it. Treat this as a prioritisation tool for your last 3 days, not a reason to skip revising anything else entirely.

3

Don't round until the final line

Keep the full calculator display through every step of a multi-step problem. This matters even more on Paper 3, where questions often chain 3 or 4 calculations together. An early rounding error compounds through the whole answer.

4

For comparison questions, write a sentence, not just numbers

When asked to compare two box plots or two data sets, you need a written comparison ('the median for Class A is higher than Class B, and the interquartile range shows less spread'). Numbers alone without an interpreting sentence lose marks.

5

Check bearings are measured correctly

Bearings are always three digits, measured clockwise from north. A common mistake is measuring anticlockwise or forgetting the leading zero (writing 45° instead of 045°). Both lose marks even with correct working.

Avoid these

5 mistakes that cost marks

The errors examiners see most on this paper. Each one is an easy mark you already know how to keep.

Assuming a topic 'won't come up' because it appeared on an earlier paper this seriesThe spec is retested regularly. Treat every topic as possible, but prioritise your last 3 days towards topics that haven't yet appeared this series

Giving numbers only for a 'compare' question, with no written sentenceAlways add a short sentence interpreting what the numbers mean: which data set has the higher average, which has more spread, and why

Losing track of units across a multi-step problem, especially with compound interest or ratioWrite the unit next to every number as you go, and check your final answer's unit matches what the question asked for

Measuring a bearing anticlockwise, or without the leading zero for angles under 100°Always measure clockwise from north and give bearings as three digits: 045°, not 45°

Confusing enlargement scale factors, using a negative or fractional scale factor incorrectlyRemember: a scale factor between 0 and 1 makes the shape smaller, and a negative scale factor flips the shape through the centre of enlargement

Exam day

The morning of the exam

The 60 minutes before you walk in. Review what you know and settle your nerves.

  • Check your calculator is in degrees mode and has a working battery, the same check as Paper 2, but easy to forget by your final exam
  • Remind yourself of the topic-gap logic: think about what hasn't come up yet this series and keep it fresh in your mind as you open the paper
  • Skim your circle theorem reasons and bearings method one final time
  • Write the calculation before you press any calculator buttons, every time. It protects your method marks
  • Attempt every question, even partially. A method mark for a half-finished answer beats a blank box
  • Leave your last 5 minutes to check unanswered questions and any 'compare' questions that need a written sentence, not just numbers

Now test yourself

You do not revise maths by reading it. Work exam-style questions in PrepWise, get them marked instantly, and see exactly which topics still cost you marks.

Practise Maths questions

Start the 3-day plan now

Open the Maths Knowledge Organisers, quiz every priority topic and walk in ready. Free during alpha.

Get started with your personalised revision
Get started with your personalised revisionStart here