Keystones — Lintel
Five GCSE retrieval questions · 31 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.091
Answer: 9.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 51°. Find opposite
Answer: 13.6cm -
4. Ratio Mixed ratio problems
In ratio 4:4:3, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 43, 15, 27, 19, 24, 34
Answer: 27