The Question That Went Viral
Ahead of a recent GCSE Maths Paper 2, the revision platform Save My Exams asked 500 UK parents to answer a real past GCSE Maths question — one that had already appeared on both the foundation and higher tier papers. The results were striking: 85% couldn't answer it correctly. Of that group, 55% gave a wrong answer outright, and 30% couldn't attempt an answer at all.
The topic wasn't advanced calculus or anything unusual — it was changing ratios, a subject every GCSE Maths student covers. Worth being clear about who was actually tested here: this was a survey of parents, not students sitting the real exam, so it's not a claim about how GCSE candidates themselves performed. But it's still a genuinely useful signal — ratio problems that ask you to find the value of one "part" before using it elsewhere are a well-known sticking point, and examiner reports from exam boards regularly note that candidates attempt ratio methods but process the information incorrectly along the way.
Try It Yourself First
Here's a question in the same style and difficulty, so you can genuinely test yourself before reading the solution:
Amara, Ben, and Chidi share a prize in the ratio 3 : 5 : 8. Amara receives £54. How much more money does Chidi receive than Ben?
Take a moment and actually attempt it before scrolling on. The method matters more than getting lucky with the answer.
Why This Type of Question Catches People Out
Ratio questions like this one aren't difficult because the maths itself is advanced — they're difficult because of the order of operations required. Most people's instinct is to jump straight to an answer using the numbers given, without first establishing what a single "share" of the ratio is actually worth. Skip that step, and everything after it falls apart, even if your arithmetic along the way is perfectly correct.
This matches exactly what exam boards themselves report: candidates frequently attempt a ratio-based method, but make an error early in the process — usually by not identifying the value of one part first — which then carries through to an incorrect final answer, even when the rest of their working looks reasonable.
The Worked Solution
Step 1: Find the value of one "share." Amara's share is 3 parts of the ratio, and she received £54. £54 ÷ 3 = £18 per share
Step 2: Use that value to find Ben's and Chidi's amounts. Ben's share is 5 parts: 5 × £18 = £90 Chidi's share is 8 parts: 8 × £18 = £144
Step 3: Answer the actual question asked. The question asks how much more Chidi received than Ben: £144 − £90 = £54
The most common mistake here isn't a calculation error — it's skipping Step 1 entirely and trying to work directly with the ratio numbers (3, 5, 8) as if they were pounds, or answering a different question than the one actually asked (giving Chidi's total instead of the difference between Chidi and Ben).
How to Avoid This Mistake in Your Own Exam
Always find the value of one part first, before doing anything else with a ratio question — treat it as a fixed first step, not an optional one
Reread the question after you've calculated an answer, to check you've answered what was actually asked, not just produced a number
Show your working clearly, labelling what each number represents — this both reduces careless errors and picks up method marks even if your final answer is wrong
FAQs
Is it true that most GCSE students get this type of question wrong?
The verified data available is about a survey of 500 parents (85% unable to answer correctly), not a statistic about GCSE candidates themselves — genuine exam board reports describe ratio questions as commonly mishandled, but don't publish a single clean "percentage of students" figure for this specific question type.
What GCSE topic does this question fall under?
This is a "changing ratios" or "sharing in a ratio" question, a core part of the UK GCSE Maths syllabus across all major exam boards, appearing on both foundation and higher tier papers.
How can I practice more questions like this?
Past papers from your exam board (AQA, Edexcel, OCR) are the most reliable source, since they reflect the actual style and difficulty you'll see — a tutor can also help identify exactly which type of ratio question tends to trip you up specifically.
If ratio questions (or any part of GCSE Maths) tend to catch you out, you're in very good company — even most adults surveyed couldn't solve one correctly. A tutor who can spot exactly where your method breaks down makes a bigger difference than more practice alone. Visit vitaleducators.com to find a maths tutor matched to your specific needs.