Keystones — Lintel

Five GCSE retrieval questions · 22 January 2023 · mathsvault.uk/keystones

1. Number

Calculate: 994 + 785

Answer: 1779
2. Algebra

Solve: ^x⁄₃ = 9

Answer: x = 27
3. Geometry

Adjacent = 20cm, hypotenuse = 30cm. Find the angle

Answer: 48.2°
4. Ratio

Simplify: 8:24:24

Answer: 1:3:3
5. Statistics

A bag has 5 red and 5 blue balls. What is the probability of picking a red ball?

Answer: ¹⁄₂

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