Keystones — Cornerstone

Five GCSE retrieval questions · 27 June 2024 · mathsvault.uk/keystones

1. Number

29000

Answer: 2.9 × 10⁴
2. Algebra

What is the next term? 8, 32, 128, 512, ...

Answer: 2048
3. Geometry

Calculate the area of a circle with diameter 19cm

Answer: 283.53cm²
4. Ratio

Simplify the ratio 18:15

Answer: 6:5
5. Statistics

Calculate the mean of: 17, 22, 38, 24, 39, 18, 25

Answer: 26.1

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