Keystones — Capstone

Five GCSE retrieval questions · 10 May 2023 · mathsvault.uk/keystones

1. Number

Calculate: 990 + 653

Answer: 1643
2. Algebra

Solve: ^x⁄₈ = 2.5

Answer: x = 20
3. Geometry

Find the distance between (-6, -2) and (8, 9)

Answer: 17.8
4. Ratio

Simplify the ratio 7m:700cm

Answer: 1:100
5. Statistics

The mean of 4 numbers is 31. If 3 of them are 30, 35, 38, what is the missing number?

Answer: 21

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