Keystones — Lintel
Five GCSE retrieval questions · 29 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0044
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 30°. Find opposite
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:12
Answer: 1:1:3 -
5. Statistics Mean
Calculate the mean of: 22, 29, 35, 36, 20, 21
Answer: 27.2