Keystones — Lintel
Five GCSE retrieval questions · 16 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
71000000
Answer: 7.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 52°. Find opposite
Answer: 15.4cm -
4. Ratio Mixed ratio problems
£441.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £245.00 -
5. Statistics Mean
Calculate the mean of: 26, 16, 18, 31, 43, 41
Answer: 29.2