Keystones — Lintel
Five GCSE retrieval questions · 1 July 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
66000000
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 41°. Find adjacent side
Answer: 21.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 8, 5, 30, 12, 50, 19, 22
Answer: 20.9