Keystones — Lintel
Five GCSE retrieval questions · 9 April 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.085
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 46°. Find adjacent side
Answer: 24.3cm -
4. Ratio Mixed ratio problems
Divide 77 in the ratio 1:3:3
Answer: 11, 33 and 33 -
5. Statistics Mean
Calculate the mean of: 23, 49, 11, 22, 12, 39
Answer: 26