Keystones — Bedrock

Five GCSE retrieval questions · 16 September 2025 · mathsvault.uk/keystones

1. Number

Calculate: -2 + (-6)

Answer: -8
2. Algebra

Simplify: 4x + 3x

Answer: 7x
3. Geometry

Opposite = 14cm, hypotenuse = 28cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Calculate 10% of 151

Answer: 15.1
5. Statistics

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

Answer: ¹⁄₂

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