Keystones — Cornerstone

Five GCSE retrieval questions · 16 May 2025 · mathsvault.uk/keystones

1. Number

17000

Answer: 1.7 × 10⁴
2. Algebra

Solve: 7x = 49

Answer: x = 7
3. Geometry

Opposite = 12cm, adjacent = 9cm. Calculate the angle

Answer: 53.1°
4. Ratio

Simplify the ratio 4:12

Answer: 1:3
5. Statistics

Calculate the mean of: 50, 30, 9, 13, 49, 9, 29

Answer: 27

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