Keystones — Cornerstone

Five GCSE retrieval questions · 14 May 2025 · mathsvault.uk/keystones

1. Number

Add: ²⁄₃ + ⁷⁄₈

Answer: ³⁷⁄₂₄
2. Algebra

Factorise: 40x + 30

Answer: 5(8x + 6)
3. Geometry

Opposite = 9cm, adjacent = 19cm. Calculate the angle

Answer: 25.3°
4. Ratio

Simplify the ratio 20:24

Answer: 5:6
5. Statistics

Find the mean of: 14, 12, 20, 11

Answer: 14.25

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