Keystones — Lintel

Five GCSE retrieval questions · 14 May 2025 · mathsvault.uk/keystones

1. Number

Find the total of 276, 283, and 83

Answer: 642
2. Algebra

Solve: ^x⁄₂ = 5

Answer: x = 10
3. Geometry

Adjacent = 12cm, hypotenuse = 26cm. Find the angle

Answer: 62.5°
4. Ratio

Simplify the ratio 3m:300cm

Answer: 1:100
5. Statistics

A bag has 7 red and 4 blue balls. What is the probability of picking a red ball?

Answer: ⁷⁄₁₁

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