Keystones — Lintel
Five GCSE retrieval questions · 23 July 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0046
Answer: 4.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 43°. Find adjacent side
Answer: 23.4cm -
4. Ratio Mixed ratio problems
In ratio 2:4:1, what fraction is the second part?
Answer: 4⁄7 -
5. Statistics Mean
Calculate the mean of: 37, 15, 18, 24, 27, 20, 32
Answer: 24.7