Keystones — Lintel

Five GCSE retrieval questions · 25 August 2023 · mathsvault.uk/keystones

1. Number

Calculate: 990 + 624

Answer: 1614
2. Algebra

Solve: ^x⁄₂ = 10.5

Answer: x = 21
3. Geometry

Adjacent = 19cm, hypotenuse = 38cm. Find the angle

Answer: 60°
4. Ratio

Find 27% of 339

Answer: 91.53
5. Statistics

A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

Answer: ⁵⁄₈

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