Keystones — Cornerstone

Five GCSE retrieval questions · 5 February 2026 · mathsvault.uk/keystones

1. Number

Simplify: x⁶ × x⁴

Answer: x¹⁰
2. Algebra

Expand: 5(4x + 8)

Answer: 20x + 40
3. Geometry

Calculate the perimeter of a right triangle with sides 7cm and 8cm

Answer: 25.6cm
4. Ratio

Simplify the ratio 6:24

Answer: 1:4
5. Statistics

Calculate the mean of: 13, 50, 14, 24, 25, 17

Answer: 23.8

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.