Keystones — Lintel

Five GCSE retrieval questions · 7 August 2023 · mathsvault.uk/keystones

1. Number

Calculate: 146 + 394

Answer: 146 + 394 = 540
2. Algebra

Solve: 3x = 12

Answer: x = 4
3. Geometry

A circle has area 78.5cm². Find its radius (dp)

Answer: 5cm
4. Ratio

Simplify: 6:18:6

Answer: 1:3:1
5. Statistics

A bag has 3 red and 3 blue balls. What is the probability of picking a red ball?

Answer: ¹⁄₂

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