Keystones — Cornerstone

Five GCSE retrieval questions · 15 April 2026 · mathsvault.uk/keystones

1. Number

330000

Answer: 3.3 × 10⁵
2. Algebra

Solve: x + 12 = 25

Answer: x = 13
3. Geometry

Calculate the area of a circle with diameter 22cm

Answer: 380.13cm²
4. Ratio

Calculate 50% of 41

Answer: 20.5
5. Statistics

Find the mean of: 2, 14, 7, 12

Answer: 8.75

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