Keystones — Cornerstone

Five GCSE retrieval questions · 24 February 2025 · mathsvault.uk/keystones

1. Number

Simplify: 6³ × 6²

Answer: 6⁵
2. Algebra

Solve: x + 10 = 24

Answer: x = 14
3. Geometry

Opposite = 20cm, adjacent = 19cm. Calculate the angle

Answer: 46.5°
4. Ratio

Simplify: 4:10:6

Answer: 2:5:3
5. Statistics

Find the mean of: 18, 4, 20

Answer: 14

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