How to Get a Grade 4 in GCSE Maths
A grade 4 is the standard pass in GCSE Maths — the grade most employers and sixth forms are looking for, and the one that removes maths as a barrier for whatever comes next. If you're currently sitting at a grade 2 or 3, closing that gap is more achievable than it probably feels right now.
This guide explains exactly what's needed to reach grade 4, which topics will give you the most marks, and what the common mistakes are — based on what examiners actually say, not just general revision advice.
What a Grade 4 Actually Requires
The grade 4 boundary varies slightly each year, but you're typically looking at around 140–160 marks out of 240 across three papers. That's roughly 58–67%.
You don't need to get everything right. What grade 4 students do well is pick up marks consistently on the accessible topics — the ones that appear every year, reward a clear method, and don't require anything too complex. The students who miss grade 4 aren't usually failing hard questions; they're dropping marks on questions they nearly understood.
The Topics Worth the Most Effort
These are the topics that sit right on the grade 3/4 boundary — appear frequently, carry decent marks, and respond well to focused practice.
Percentages
Percentage questions appear on almost every paper and cover three main types: finding a percentage of an amount, percentage change, and reverse percentages. The first two are achievable at grade 3. Reverse percentages is where grade 4 marks are won or lost.
The most common mistake examiners highlight: dividing by the percentage instead of the multiplier. If a price was increased by 20% and you're given the new price, you don't divide by 20 or by 0.2 — you divide by 1.2 (the multiplier used to get there). Write the multiplier down before you do anything else.
Also watch for questions asking for the percentage change versus the final value. Students often calculate the right number but answer a slightly different question. Re-read what the question is actually asking before you write your answer.
Practise percentage questions →
Probability Trees
Probability trees are one of the more reliably accessible grade 4 topics — the structure of the diagram tells you exactly what to do. But students consistently lose marks in the same ways.
The two rules to write at the top of any tree question:
- Multiply along a branch (to find the probability of two events both happening)
- Add across separate branches (to find the probability of different routes to the same outcome)
The other major trap: the phrase "at least one". If a question asks for the probability of getting heads at least once in two flips, that includes both flips being heads as well as exactly one. Students who only calculate one of those cases miss marks. The easier approach is the complement method: P(at least one) = 1 − P(none at all).
Pythagoras' Theorem
Pythagoras is a reliable source of marks at grade 4, but it's also where students make frustratingly avoidable errors.
The most common: forgetting to take the square root at the end. The formula gives you c², not c. Taking the square root is always the final step — it's easy to miss under pressure.
The second: adding squares when you should be subtracting (or vice versa). Before you start calculating, decide which side you're finding. If it's the hypotenuse (the longest side, opposite the right angle), you add. If it's one of the shorter sides, you subtract. Write that rearrangement explicitly — c² = a² + b² or a² = c² − b² — before putting numbers in.
Solving Linear Equations
Solving equations is a topic where the method is straightforward but marks get lost through small errors that compound. The examiner's advice is consistent: show every step on a separate line. Students who try to do too much in their head make sign errors they can't spot later.
Equations with the unknown on both sides (e.g. 3x + 5 = x + 13) are a grade 4 staple. The method is always the same: get all the x terms on one side, all the numbers on the other, then divide. Write out each inverse operation explicitly.
Area and Volume
Area and volume questions span a wide range of difficulty, but the grade 4 marks are accessible. Circle questions (area and circumference) appear regularly and reward students who know the formulas and apply them carefully.
The most common error: using the diameter instead of the radius. Check what the question gives you before substituting into a formula. If you have the diameter, halve it first. Write "r = ..." explicitly at the start of your working.
For composite shapes (a rectangle with a semicircle on top, for example), calculate each part separately before adding. Don't try to combine them into a single formula.
What to Do With Your Mistakes
The biggest difference between students who reach grade 4 and those who don't is what they do after getting a question wrong.
Most students look at the mark scheme, think "oh, I see" and move on. That's not enough. For each topic where you're dropping marks, ask:
- Did I not know the method at all? → Do more practice questions on that specific topic before moving on.
- Did I know the method but make an arithmetic or sign error? → Practise writing out every step clearly. These errors almost always come from rushing or doing too much mentally.
- Did I start correctly but lose track? → Work on setting out your method more neatly so you can follow your own working.
Each type of error needs a slightly different response. Recognising which one you're making is half the battle.
How to Use Your Revision Time
For most students, moving from a grade 3 to a grade 4 takes 6–8 weeks of consistent revision — around 30–40 minutes a day, five days a week. The key is that it needs to be active: doing practice questions and reviewing errors, not reading notes or watching videos.
If you're unsure where to start, go back to your most recent mock paper. Find every topic where you dropped more than half the marks available. Those are your priority topics. Work through them one at a time before adding anything new.
See also: How long does it take to revise GCSE Maths?
Ready to start? Try some free practice questions — every topic is available, graded by difficulty, so you can practise exactly where you need to.