Keystones — Cornerstone

Five GCSE retrieval questions · 11 February 2023 · mathsvault.uk/keystones

1. Number

2700000

Answer: 2.7 × 10⁶
2. Algebra

What is the next term? 3, 9, 27, 81, ...

Answer: 243
3. Geometry

Calculate the distance between (5, 6) and (8, 10)

Answer: 5
4. Ratio

Simplify: 4:12:4

Answer: 1:3:1
5. Statistics

Calculate the mean of: 14, 43, 19, 39, 34, 6, 48

Answer: 29

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