Keystones — Lintel
Five GCSE retrieval questions · 25 July 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
4200000
Answer: 4.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 43°. Find opposite
Answer: 12.cm -
4. Ratio Mixed ratio problems
Divide 189 in the ratio 2:3:4
Answer: 42, 63 and 84 -
5. Statistics Mean
Calculate the mean of: 23, 31, 7, 38, 10, 28, 26
Answer: 23.3