Keystones — Cornerstone

Five GCSE retrieval questions · 8 December 2025 · mathsvault.uk/keystones

1. Number

Add: ⁴⁄₅ + ⁵⁄₇

Answer: ⁵³⁄₃₅
2. Algebra

Solve: x + 13 = 31

Answer: x = 18
3. Geometry

Calculate the area of a circle with diameter 9cm

Answer: 63.62cm²
4. Ratio

Simplify: 12:4:6

Answer: 6:2:3
5. Statistics

Calculate the mean of: 37, 48, 46, 33, 8, 29, 46

Answer: 35.3

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.