On the most recent published boundaries, a 5-5 in AQA GCSE Combined Science: Trilogy (Higher tier) needed 140 out of 420 — 33%. That is June 2025's boundary, not a promise about next summer.
| Marks needed (June 2025) | 140 / 420 |
| As a percentage | 33% |
| Marks above a 5-4 | 22 |
| Marks short of a 6-5 | 22 |
| Series on record | 1 (June 2025) |
Based on the 5-5 boundary of 140 out of 420. Next summer's boundary will differ — see the range below.
| Series | Marks | % |
|---|---|---|
| June 2025 | 140 | 33% |
There is only one series on record here — June 2025 — so there is no range to reason from. Boundaries routinely move by ten marks or more between years, so treat 140 as a marker rather than a target: 142 is the number to aim at, and more if you can.
Boundaries are set after every paper is marked, precisely so that a grade means the same thing in an easy year and a hard one. That is why nobody — not this page, not your teacher, not the board — can tell you next summer's number in advance. Anyone who gives you one exactly is guessing.
140 out of 420 — 33% — on the June 2025 boundaries. That is the only series on record, so aim nearer 142 to leave room for a year that has not happened yet.
Almost certainly not. Boundaries are set after marking so that a grade represents the same standard however hard the paper was. A harder paper gets a lower boundary and an easier one gets a higher boundary.
22 marks on the most recent boundaries — usually a question or two, not a different student.
Boundaries read 18 August 2026 from the official AQA document: source PDF.
Boundaries read 19 August 2026 from the exam boards' own documents. Boundaries are set per series and never apply to a future paper.