Keystones — Bedrock

Five GCSE retrieval questions · 12 March 2025 · mathsvault.uk/keystones

1. Number

Calculate: ⁵⁄₁₂ + ²⁄₁₂

Answer: ⁷⁄₁₂
2. Algebra

Simplify: 5x + 7x

Answer: 12x
3. Geometry

Opposite = 15cm, hypotenuse = 21.2cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 8:10

Answer: 4:5
5. Statistics

Find the mean of: 19, 15, 19, 11

Answer: 16

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