Keystones — Lintel
Five GCSE retrieval questions · 31 August 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
550000
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 49°. Find opposite
Answer: 34.5cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £104.00 -
5. Statistics Mean
Calculate the mean of: 15, 43, 46, 22, 45, 22, 17, 13
Answer: 27.9