Keystones — Lintel

Five GCSE retrieval questions · 11 October 2025 · mathsvault.uk/keystones

1. Number

What is the missing number: 89 + ? = 149

Answer: 60
2. Algebra

Factorise: 9x² + 8x

Answer: x(9x + 8)
3. Geometry

Adjacent = 19cm, hypotenuse = 30cm. Find the angle

Answer: 50.7°
4. Ratio

Simplify: 10:8:6

Answer: 5:4:3
5. Statistics

A spinner has 6 red, 4 blue and 3 green sections. Probability of landing on red?

Answer: ⁶⁄₁₃

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.