Keystones — Lintel
Five GCSE retrieval questions · 13 March 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 - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 52°. Find opposite
Answer: 34.6cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 1:2:3
Answer: 28, 56 and 84 -
5. Statistics Mean
Calculate the mean of: 23, 35, 29, 36, 9, 46, 40
Answer: 31.1