Keystones Lintel — 20 October 2020

Keystones — Lintel

Five GCSE retrieval questions · 20 October 2020 · mathsvault.uk/keystones

1. Number Converting to standard form

350000

Answer: 3.5 × 10⁵
2. Algebra Factorising monic quadratics

Factorise: x² + 2x - 3

Answer: (x + 3)(x - 1)
3. Geometry SOHCAHTOA — missing length

Adjacent = 30cm, angle = 38°. Find opposite

Answer: 23.4cm
4. Ratio Mixed ratio problems

Simplify: 9:15:18

Answer: 3:5:6
5. Statistics Mean

Calculate the mean of: 17, 41, 5, 15, 15, 26

Answer: 19.8

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