Keystones — Cornerstone

Five GCSE retrieval questions · 13 July 2023 · mathsvault.uk/keystones

1. Number

900000

Answer: 9 × 10⁵
2. Algebra

Solve: x + 5 = 25

Answer: x = 20
3. Geometry

Find the area of a circle with radius 4cm

Answer: 50.27cm²
4. Ratio

Simplify: 9:15:15

Answer: 3:5:5
5. Statistics

Calculate the mean of: 9, 46, 11, 23, 7, 40, 33

Answer: 24.1

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