Keystones — Lintel
Five GCSE retrieval questions · 28 January 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.035
Answer: 3.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 33°. Find opposite
Answer: 13cm -
4. Ratio Mixed ratio problems
In ratio 4:1:4, what fraction is the second part?
Answer: 1⁄9 -
5. Statistics Mean
Calculate the mean of: 40, 45, 9, 6, 8, 41
Answer: 24.8