Keystones — Lintel

Five GCSE retrieval questions · 17 December 2022 · mathsvault.uk/keystones

1. Number

Calculate: 999 + 627

Answer: 1626
2. Algebra

Solve: ^x⁄₄ = 9

Answer: x = 36
3. Geometry

Find c if a = 19cm and b = 15cm in a right triangle

Answer: 24.2cm
4. Ratio

Simplify the ratio 2m:200cm

Answer: 1:100
5. Statistics

Find the range of: 23, -9, -15, 10, -4

Answer: 38

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