Keystones — Lintel
Five GCSE retrieval questions · 13 November 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0002
Answer: 2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 34°. Find opposite
Answer: 16.9cm -
4. Ratio Mixed ratio problems
£368.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £230.00 -
5. Statistics Mean
Calculate the mean of: 46, 28, 12, 42, 40, 39
Answer: 34.5