Keystones — Lintel
Five GCSE retrieval questions · 22 October 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
35000
Answer: 3.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 58°. Find adjacent side
Answer: 19.6cm -
4. Ratio Mixed ratio problems
£154.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
Calculate the mean of: 5, 34, 14, 6, 8, 17, 18, 10
Answer: 14