Keystones — Lintel
Five GCSE retrieval questions · 31 May 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00074
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 32°. Find adjacent side
Answer: 33.cm -
4. Ratio Mixed ratio problems
In ratio 3:2:2, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 25, 29, 18, 37, 17, 47
Answer: 28.8