Keystones — Lintel
Five GCSE retrieval questions · 7 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0026
Answer: 2.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 63°. Find adjacent side
Answer: 16.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 18, 31, 5, 18, 23, 12, 39
Answer: 20.9