Keystones — Lintel
Five GCSE retrieval questions · 3 December 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
8800000
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 38°. Find adjacent side
Answer: 12.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 21, 41, 45, 21, 9, 20, 28
Answer: 26.4