Keystones — Lintel
Five GCSE retrieval questions · 17 June 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
29000
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 51°. Find opposite
Answer: 25.9cm -
4. Ratio Mixed ratio problems
Simplify: 9:9:12
Answer: 3:3:4 -
5. Statistics Mean
Calculate the mean of: 38, 42, 44, 47, 5, 10, 47, 50
Answer: 35.4