Keystones — Lintel

Five GCSE retrieval questions · 10 May 2026 · mathsvault.uk/keystones

1. Number

Calculate: 827 + 394

Answer: 827 + 394 = 1221
2. Algebra

Solve: ^x⁄₂ = 16

Answer: x = 32
3. Geometry

Adjacent = 19cm, hypotenuse = 34cm. Find the angle

Answer: 56°
4. Ratio

Calculate 29.4% of 221

Answer: 64.97
5. Statistics

Calculate the mean of: 48, 45, 46, 5, 48, 41

Answer: 38.8

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