Keystones — Lintel

Five GCSE retrieval questions · 16 July 2026 · mathsvault.uk/keystones

1. Number

Calculate: 994 + 694

Answer: 1688
2. Algebra

Solve: ^x⁄₈ = 1

Answer: x = 8
3. Geometry

Adjacent = 25cm, hypotenuse = 40cm. Find the angle

Answer: 51.3°
4. Ratio

Simplify: 12:12:24

Answer: 1:1:2
5. Statistics

A bag has 8 red and 8 blue balls. What is the probability of picking a red ball?

Answer: ¹⁄₂

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