Keystones — Lintel
Five GCSE retrieval questions · 1 January 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
38000
Answer: 3.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 35°. Find opposite
Answer: 10.5cm -
4. Ratio Mixed ratio problems
In ratio 2:3:1, what fraction is the second part?
Answer: 3⁄6 -
5. Statistics Mean
Calculate the mean of: 35, 37, 47, 10, 8, 30, 50
Answer: 31