Keystones — Lintel

Five GCSE retrieval questions · 14 April 2022 · mathsvault.uk/keystones

1. Number

Calculate: 489 + 261

Answer: 489 + 261 = 750
2. Algebra

Solve: ^x⁄₄ = 10

Answer: x = 40
3. Geometry

Adjacent = 25cm, hypotenuse = 37cm. Find the angle

Answer: 47.5°
4. Ratio

Simplify: 15:18:15

Answer: 5:6:5
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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