Keystones — Bedrock

Five GCSE retrieval questions · 23 June 2025 · mathsvault.uk/keystones

1. Number

Calculate: ⁹⁄₁₂ + ²⁄₁₂

Answer: ¹¹⁄₁₂
2. Algebra

Simplify: 9x + 2x

Answer: 11x
3. Geometry

Opposite = 9cm, hypotenuse = 18cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 12:6

Answer: 2:1
5. Statistics

Find the mean of: 15, 11, 15

Answer: 13.666666666667

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