Keystones — Lintel

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

1. Number

What is the missing number: 75 + ? = 162

Answer: 87
2. Algebra

Solve: ^x⁄₃ = 12.333333333333

Answer: x = 37
3. Geometry

Calculate the area of a right triangle with perpendicular sides 14cm and 14cm

Answer: 98cm²
4. Ratio

Calculate 39.6% of 404

Answer: 159.98
5. Statistics

Find the range of: -8, 49, 43, -6, -12

Answer: 61

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