Keystones — Lintel

Five GCSE retrieval questions · 11 March 2026 · mathsvault.uk/keystones

1. Number

What is the missing number: 89 + ? = 195

Answer: 106
2. Algebra

Solve: 4x = 24

Answer: x = 6
3. Geometry

Opposite = 11cm, adjacent = 8cm. Calculate the angle

Answer: 54°
4. Ratio

Simplify: 12:12:9

Answer: 4:4:3
5. Statistics

A bag has 3 red and 8 blue balls. What is the probability of picking a red ball?

Answer: ³⁄₁₁

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