Keystones — Cornerstone

Five GCSE retrieval questions · 3 February 2025 · mathsvault.uk/keystones

1. Number

Add: ⁵⁄₇ + ¹⁄₃

Answer: ²²⁄₂₁
2. Algebra

Solve: x + 2 = 19

Answer: x = 17
3. Geometry

Calculate the area of a circle with diameter 15cm

Answer: 176.71cm²
4. Ratio

Calculate 25% of 107

Answer: 26.75
5. Statistics

Find the range of: 13, 22, 9, 24, 16

Answer: 15

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