Keystones — Lintel
Five GCSE retrieval questions · 23 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00041
Answer: 4.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 37°. Find opposite
Answer: 19.6cm -
4. Ratio Mixed ratio problems
In ratio 3:3:2, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 23, 45, 24, 29, 5, 36
Answer: 27