Keystones — Lintel

Five GCSE retrieval questions · 18 June 2022 · mathsvault.uk/keystones

1. Number

Calculate: 993 + 768

Answer: 1761
2. Algebra

What is the next term? 5, 20, 80, 320, ...

Answer: 1280
3. Geometry

A circle has area 452.4cm². Find its radius (dp)

Answer: 12cm
4. Ratio

Simplify: 6:4:6

Answer: 3:2:3
5. Statistics

A bag has 3 red and 4 blue balls. What is the probability of picking a red ball?

Answer: ³⁄₇

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