Keystones — Lintel
Five GCSE retrieval questions · 25 June 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
280000
Answer: 2.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 41°. Find opposite
Answer: 25.2cm -
4. Ratio Mixed ratio problems
£204.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £136.00 -
5. Statistics Mean
Calculate the mean of: 20, 8, 27, 21, 8, 12, 24, 36
Answer: 19.5