Keystones — Cornerstone

Five GCSE retrieval questions · 1 January 2025 · mathsvault.uk/keystones

1. Number

43000000

Answer: 4.3 × 10⁷
2. Algebra

Solve: 7x = 56

Answer: x = 8
3. Geometry

Find the distance between (5, 5) and (9, 12)

Answer: 8.06
4. Ratio

Simplify: 18:15:6

Answer: 6:5:2
5. Statistics

Calculate the range of: 23, 70, 62, 29, 74, 77

Answer: 54

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