Keystones — Cornerstone

Five GCSE retrieval questions · 19 April 2025 · mathsvault.uk/keystones

1. Number

Calculate: 838 + 922

Answer: 838 + 922 = 1760
2. Algebra

Factorise: 42x + 48

Answer: 6(7x + 8)
3. Geometry

Opposite = 17cm, adjacent = 17cm. Calculate the angle

Answer: 45°
4. Ratio

Simplify: 16:8:24

Answer: 2:1:3
5. Statistics

A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

Answer: ⁵⁄₈

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.