Keystones — Lintel
Five GCSE retrieval questions · 7 July 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.029
Answer: 2.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 59°. Find opposite
Answer: 21.6cm -
4. Ratio Mixed ratio problems
Simplify: 20:8:8
Answer: 5:2:2 -
5. Statistics Mean
Calculate the mean of: 36, 8, 38, 40, 26, 23
Answer: 28.5