Keystones — Cornerstone

Five GCSE retrieval questions · 8 December 2023 · mathsvault.uk/keystones

1. Number

Calculate: ²⁄₁₀ + ²⁄₁₀

Answer: ²⁄₅
2. Algebra

Factorise: 2x² + 8x

Answer: 2x(x + 4)
3. Geometry

Calculate the distance between (4, 9) and (7, 13)

Answer: 5
4. Ratio

Simplify: 16:20:8

Answer: 4:5:2
5. Statistics

Calculate the mean of: 27, 25, 31, 15, 36, 42, 27, 31

Answer: 29.3

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