Keystones — Lintel
Five GCSE retrieval questions · 27 December 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
36000
Answer: 3.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 54°. Find opposite
Answer: 27.5cm -
4. Ratio Mixed ratio problems
Simplify: 6:9:18
Answer: 2:3:6 -
5. Statistics Mean
Calculate the mean of: 22, 5, 20, 37, 24, 36, 12
Answer: 22.3