Keystones — Cornerstone

Five GCSE retrieval questions · 28 February 2022 · mathsvault.uk/keystones

1. Number

What is the missing number: 87 + ? = 163

Answer: 76
2. Algebra

Factorise: 7x² + 2x

Answer: x(7x + 2)
3. Geometry

Opposite = 12cm, hypotenuse = 13.9cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify: 15:12:18

Answer: 5:4:6
5. Statistics

What is the probability of getting heads when flipping a fair coin?

Answer: ¹⁄₂

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.