Keystones — Bedrock

Five GCSE retrieval questions · 12 August 2025 · mathsvault.uk/keystones

1. Number

80000

Answer: 8 × 10⁴
2. Algebra

Find the next term: 9, 11, 13, 15, ...

Answer: 17
3. Geometry

Opposite = 5cm, hypotenuse = 5.8cm. Find the angle

Answer: 60° (approximately)
4. Ratio

In ratio 5:3, the difference between shares is 56. What are the shares?

Answer: 140 and 84
5. Statistics

Find the mean of: 3, 10, 9, 15

Answer: 9.25

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