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At least 20% of the marks across all six AQA GCSE Combined Science: Trilogy (8464) papers require mathematical skills. This means around 84 marks out of 420 will involve calculations, data handling, unit conversions, or graph work. This lesson covers the key mathematical skills you need, with worked examples and common pitfalls.
The AQA specification lists the following mathematical skills across all three sciences:
| Category | Skills | Where they appear |
|---|---|---|
| Arithmetic and numerical computation | Percentages, ratios, fractions, decimals, standard form, significant figures | All six papers |
| Handling data | Mean, median, mode, range, identifying anomalies | All six papers |
| Algebra | Rearranging equations, substituting values, understanding proportionality | Mainly Physics and Chemistry |
| Graphs | Plotting, reading values, calculating gradients, area under a curve, lines of best fit | All six papers |
| Geometry and measurement | Unit conversions, scale, surface area to volume ratios | All six papers |
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