Keystones — Bedrock

Five GCSE retrieval questions · 23 March 2025 · mathsvault.uk/keystones

1. Number

70000

Answer: 7 × 10⁴
2. Algebra

Factorise: 15x + 6

Answer: 3(5x + 2)
3. Geometry

Find the area of a circle with radius 7cm

Answer: 153.94cm²
4. Ratio

In ratio 4:1, the difference between shares is 69. What are the shares?

Answer: 92 and 23
5. Statistics

Find the mean of: 18, 10, 7

Answer: 11.666666666667

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