It's rarely raw content knowledge that's missing. Here's where 11+ maths most often catches confident children out.
25 August 2026 · 5 min read
It's a common and slightly puzzling pattern: a child who's comfortably above average at school maths sits an 11+ practice paper and performs noticeably below what their classwork would suggest. The reason usually isn't a content gap. It's one of a handful of specific skills that school maths doesn't always test as heavily as the 11+ does.
Take a typical 11+-style question: "A school has 3 times as many pupils as teachers, and there are 24 more pupils than teachers. How many teachers are there?" Working this out means recognising the relationship (pupils = 3 × teachers), setting up that the difference between the two groups is 24, and solving from there — teachers = 12, pupils = 36 (36 is indeed 3 times 12, and the difference is 24). That's several connected reasoning steps before any straightforward calculation happens, and it's exactly the kind of layered problem that catches out children who are fluent at single-step arithmetic but less practised at holding several conditions in mind at once.
11+ papers often describe an ordinary calculation using less common vocabulary or an unusual context — the maths itself might be simple ratio or percentage work, dressed in a scenario a child hasn't seen phrased quite that way before. Children who've mostly practised with school-style wording sometimes hesitate on 11+ phrasing purely because it doesn't immediately match a familiar pattern, even though the underlying skill is one they already have.
Classwork rarely puts the same tight time limits on a child that a real 11+ paper does. A child who's accurate but not yet fast — someone who still works out times tables rather than instantly recalling them, for instance — can run out of time on a real paper despite knowing the content perfectly well. This is really a fluency gap rather than a knowledge gap, and it needs different practice: see what is maths fluency and why does it matter?.
An 11+ paper moves rapidly between arithmetic, reasoning, shape and measurement questions, often without warning. Children used to a single worksheet focused on one topic at a time can find this mental switching genuinely tiring, which contributes to mistakes appearing later in a paper that wouldn't show up on a shorter, single-topic exercise.
If a child's 11+ practice results seem out of step with their school performance, it's worth checking whether the gap is really about content, or about one of these exam-specific skills instead — timed practice, mixed-topic papers, and multi-step reasoning questions specifically, rather than more general revision of content they likely already have.
Grasp Maths distinguishes content gaps from exam-specific skills like speed and multi-step reasoning, so 11+ preparation targets whichever one is actually behind a lower-than-expected result.
Try a free Grasp Maths practice session and see content gaps and exam-specific skills tracked separately.