Keystones — Lintel
Five GCSE retrieval questions · 15 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.002
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 46°. Find adjacent side
Answer: 18.cm -
4. Ratio Mixed ratio problems
In ratio 1:3:4, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 47, 24, 25, 21, 9, 32
Answer: 26.3