31 May 2026 · SEAG Genius
The SEAG maths paper is not just about knowing how to solve problems — it is about solving them quickly and accurately under time pressure. Many capable children lose marks not because they do not understand the maths, but because of avoidable errors. Here are the ten most common SEAG maths mistakes, and what to do about them.
1. Not reading the question fully
SEAG maths questions often contain key information in the middle of a sentence that children skip when rushing. A question about "how many are left over" is very different from "how many in total." Encourage your child to underline key words before calculating.
Fix: Practise reading questions twice before starting any calculation. Slow down on word problems even if the numbers look simple.
2. Confusing fractions, decimals and percentages
These three forms of the same concept are regularly tested in SEAG maths — often in the same question. Children who have not practised converting between them fluently frequently lose time and marks.
Fix: Drill conversion as a separate skill. Run through a set of 10 conversions (e.g. 0.75 → ¾ → 75%) until it is automatic.
3. Rushing multi-step problems
SEAG maths problems often require two or three steps — for example, finding a fraction of an amount and then subtracting it from a total. Children who rush past step one often reach the wrong total and cannot see why.
Fix: Encourage your child to write each step separately rather than trying to hold numbers in their head. Even one line of working reduces errors dramatically.
4. Errors with unit conversions in measures
Questions involving kilograms and grams, kilometres and metres, or hours and minutes are consistently problematic. Children often forget to convert before calculating, leading to answers that are 10, 100 or 1,000 times too large or too small.
Fix: Make unit conversion a warm-up activity. Before each maths session, spend 2 minutes on conversion questions: "How many grams in 2.5kg? How many cm in 1.8m?"
5. Misreading graphs and tables
Data questions require children to read scales carefully. A common error is reading the wrong row or column in a table, or misinterpreting the scale on a bar chart (particularly when the scale starts at a number other than zero).
Fix: When practising data questions, ask your child to say aloud what they are reading before they answer. "The bar for Tuesday reaches 35" helps them verify before writing anything down.
6. Forgetting to check if an answer makes sense
Children who calculate that a school bus contains 240 pupils or that a recipe needs 5 kilograms of sugar rarely stop to consider whether the answer is realistic. This is a habit that needs deliberate practice.
Fix: After completing a calculation, ask your child: "Does that answer make sense?" Build it into their routine — not as doubt, but as a final check step.
7. Skipping questions that look hard
Under time pressure, children often skip a question that looks difficult and run out of time before returning to it. SEAG marks are not deducted for wrong answers, so a guess is better than no answer.
Fix: Practise a skip-and-return strategy. If a question takes more than 30 seconds with no progress, mark it and move on. Return with fresh eyes at the end.
8. Weak mental maths slowing everything down
Children who need to use a written method for 7 × 8 or 56 ÷ 7 lose valuable seconds on every question. Over a 50-question paper, this adds up significantly.
Fix: Spend 5 minutes per day on times tables practice — not just reciting them, but answering random questions quickly. Apps, flashcards, or verbal quizzing all work.
9. Confusing area and perimeter
These two concepts are regularly confused despite being covered thoroughly in school. SEAG questions that mention "fencing" or "carpet" trip up many children who cannot reliably distinguish which formula to use.
Fix: Use real-world language to reinforce the distinction. "Perimeter is the length of the fence around the garden. Area is how much turf you need to fill it."
10. Not using time wisely in the final minutes
Many children spend the last few minutes of the maths paper checking answers they already know are correct, rather than going back to attempt skipped questions or harder ones they gave up on.
Fix: Practise time awareness. When practising at home, set a 20-minute timer and have your child note how many questions they can reliably complete. The goal is to finish — not to get stuck on one question.
Spotting these mistakes in practice
The best time to identify these patterns is during practice, not on the real test day. When your child completes a SEAG maths set and gets questions wrong, look at why they went wrong — not just which questions they missed. The mistake types above are patterns. Once you can recognise the pattern, you can work on it specifically.
SEAG Genius provides a worked answer for every question, which makes identifying the pattern straightforward. If your child gets three different questions wrong for the same reason — for example, consistently making errors with unit conversions — you know exactly where to focus next.
