Keystones — Lintel
Five GCSE retrieval questions · 30 August 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
270000
Answer: 2.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 44°. Find opposite
Answer: 18.3cm -
4. Ratio Mixed ratio problems
Simplify: 4:12:10
Answer: 2:6:5 -
5. Statistics Mean
Calculate the mean of: 35, 19, 12, 14, 35, 43, 28
Answer: 26.6