Keystones — Bedrock

Five GCSE retrieval questions · 26 November 2025 · mathsvault.uk/keystones

1. Number

80000

Answer: 8 × 10⁴
2. Algebra

Expand: 4(x + 5)

Answer: 4x + 20
3. Geometry

Opposite = 10cm, hypotenuse = 11.5cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 24:12

Answer: 2:1
5. Statistics

What is the probability of getting heads when flipping a fair coin?

Answer: ¹⁄₂

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