Keystones — Lintel
Five GCSE retrieval questions · 20 August 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 - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 58°. Find opposite
Answer: 17.6cm -
4. Ratio Mixed ratio problems
In ratio 4:3:2, what fraction is the second part?
Answer: 3⁄9 -
5. Statistics Mean
Calculate the mean of: 5, 33, 12, 18, 19, 8, 15
Answer: 15.7