Keystones — Lintel
Five GCSE retrieval questions · 25 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
62000
Answer: 6.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 27°. Find adjacent side
Answer: 34.7cm -
4. Ratio Mixed ratio problems
In ratio 4:4:3, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 26, 6, 40, 49, 38, 38
Answer: 32.8