Keystones — Lintel

Five GCSE retrieval questions · 8 August 2023 · mathsvault.uk/keystones

1. Number

Add: ³⁄₇ + ²⁄₅

Answer: ²⁹⁄₃₅
2. Algebra

What is the next term? 5, 15, 45, 135, ...

Answer: 405
3. Geometry

A right triangle has hypotenuse 13cm and one side 5cm. Find its area

Answer: 30cm²
4. Ratio

Simplify: 9:15:12

Answer: 3:5:4
5. Statistics

Calculate the mean of: 18, 40, 28, 35, 41, 6, 28, 31

Answer: 28.4

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