Keystones — Lintel

Five GCSE retrieval questions · 27 August 2025 · mathsvault.uk/keystones

1. Number

What is the missing number: 57 + ? = 136

Answer: 79
2. Algebra

Factorise fully: 15x² + 25x

Answer: 5x(3x + 5)
3. Geometry

Adjacent = 19cm, hypotenuse = 25cm. Find the angle

Answer: 40.5°
4. Ratio

Simplify: 10:10:4

Answer: 5:5:2
5. Statistics

A spinner has 5 red, 6 blue and 5 green sections. Probability of landing on red?

Answer: ⁵⁄₁₆

Same five questions for everyone on Lintel on this date. Sets are stored as JSON for reliable print-on-demand — sign in for school-branded PDFs.