Keystones — Cornerstone

Five GCSE retrieval questions · 11 October 2025 · mathsvault.uk/keystones

1. Number

Add: ¹⁄₄ + ⁵⁄₆

Answer: ¹³⁄₁₂
2. Algebra

Collect like terms: 5x + 7y + 6x + 3y

Answer: 11x + 10y
3. Geometry

Opposite = 13cm, adjacent = 12cm. Calculate the angle

Answer: 47.3°
4. Ratio

Find 85% of 478

Answer: 406.3
5. Statistics

Calculate the mean of: 31, 17, 30, 40, 28, 19, 17

Answer: 26

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