Keystones — Bedrock

Five GCSE retrieval questions · 15 March 2025 · mathsvault.uk/keystones

1. Number

Calculate: 46 + 11

Answer: 46 + 11 = 57
2. Algebra

Factorise: 21x + 24

Answer: 3(7x + 8)
3. Geometry

Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 16:6

Answer: 8:3
5. Statistics

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

Answer: ¹⁄₂

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