Keystones — Lintel
Five GCSE retrieval questions · 6 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.087
Answer: 8.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 47°. Find opposite
Answer: 11.8cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
Calculate the mean of: 27, 40, 12, 27, 42, 19, 24, 42
Answer: 29.1