Keystones — Lintel
Five GCSE retrieval questions · 19 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
740000
Answer: 7.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 52°. Find opposite
Answer: 25.6cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:12
Answer: 2:2:3 -
5. Statistics Mean
Calculate the mean of: 24, 36, 42, 43, 38, 5
Answer: 31.3