Keystones — Lintel
Five GCSE retrieval questions · 30 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.081
Answer: 8.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 37°. Find adjacent side
Answer: 28cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 44, 12, 7, 49, 34, 7, 11, 48
Answer: 26.5