Keystones — Bedrock

Five GCSE retrieval questions · 19 February 2025 · mathsvault.uk/keystones

1. Number

Calculate: -6 + (-1)

Answer: -7
2. Algebra

Factorise: 8x + 14

Answer: 2(4x + 7)
3. Geometry

Opposite = 10cm, hypotenuse = 20cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 16:24

Answer: 2:3
5. Statistics

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

Answer: ¹⁄₂

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