Keystones — Lintel

Five GCSE retrieval questions · 11 July 2025 · mathsvault.uk/keystones

1. Number

What is the missing number: 81 + ? = 124

Answer: 43
2. Algebra

Solve: ^x⁄₄ = 7.5

Answer: x = 30
3. Geometry

Opposite = 19cm, adjacent = 8cm. Calculate the angle

Answer: 67.2°
4. Ratio

Find 76% of 172

Answer: 130.72
5. Statistics

Calculate the mean of: 28, 34, 33, 47, 5, 24

Answer: 28.5

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