Keystones — Lintel
Five GCSE retrieval questions · 27 May 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00064
Answer: 6.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 33°. Find opposite
Answer: 14.3cm -
4. Ratio Mixed ratio problems
In ratio 4:3:1, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 47, 17, 40, 6, 14, 47, 7, 33
Answer: 26.4