Keystones — Lintel

Five GCSE retrieval questions · 6 August 2023 · mathsvault.uk/keystones

1. Number

Calculate: 990 + 667

Answer: 1657
2. Algebra

Solve: ^x⁄₂ = 18

Answer: x = 36
3. Geometry

Calculate the area of a circle with diameter 9cm

Answer: 63.62cm²
4. Ratio

Find 40% of 461

Answer: 184.4
5. Statistics

Find the range of: 8, 28, -23, -10, 19

Answer: 51

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