Keystones — Lintel

Five GCSE retrieval questions · 22 June 2026 · mathsvault.uk/keystones

1. Number

What is the missing number: 91 + ? = 190

Answer: 99
2. Algebra

Solve: ^x⁄₃ = 10

Answer: x = 30
3. Geometry

Opposite = 14cm, adjacent = 20cm. Calculate the angle

Answer: 35°
4. Ratio

Simplify the ratio 7m:700cm

Answer: 1:100
5. Statistics

Calculate the mean of: 5, 30, 31, 49, 50, 21, 34, 34

Answer: 31.8

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