Keystones — Lintel

Five GCSE retrieval questions · 5 February 2023 · mathsvault.uk/keystones

1. Number

Find the total of 142, 161, and 115

Answer: 418
2. Algebra

Solve: ^x⁄₂ = 6.5

Answer: x = 13
3. Geometry

Calculate the area of a circle with diameter 19cm

Answer: 283.53cm²
4. Ratio

Simplify: 20:8:16

Answer: 5:2:4
5. Statistics

Calculate the mean of: 38, 19, 26, 42, 49, 26

Answer: 33.3

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