Keystones — Lintel
Five GCSE retrieval questions · 17 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
94000000
Answer: 9.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 43°. Find adjacent side
Answer: 12.4cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 28, 34, 9, 42, 46, 35, 30, 25
Answer: 31.1