Keystones — Lintel

Five GCSE retrieval questions · 12 June 2026 · mathsvault.uk/keystones

1. Number

Add: ⁶⁄₈ + ⁴⁄₅

Answer: ³¹⁄₂₀
2. Algebra

Solve: 6x - 4 = 4x + 2

Answer: x = 3
3. Geometry

Calculate the area of a right triangle with perpendicular sides 6cm and 10cm

Answer: 30cm²
4. Ratio

Simplify: 10:6:12

Answer: 5:3:6
5. Statistics

Find the range of: 44, 2, 0, 15, -28

Answer: 72

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