Keystones — Lintel
Five GCSE retrieval questions · 10 November 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000000
Answer: 4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 31°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 12, 24, 12, 9, 16, 49, 47, 7
Answer: 22