Keystones — Lintel

Five GCSE retrieval questions · 18 October 2025 · mathsvault.uk/keystones

1. Number

Calculate: 999 + 654

Answer: 1653
2. Algebra

Solve: ^x⁄₆ = 2.3333333333333

Answer: x = 14
3. Geometry

Opposite = 12cm, adjacent = 17cm. Calculate the angle

Answer: 35.2°
4. Ratio

Simplify the ratio 4m:400cm

Answer: 1:100
5. Statistics

Find the range of: -12, 17, -10, 43, -14

Answer: 57

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