Keystones — Lintel
Five GCSE retrieval questions · 13 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
26000
Answer: 2.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 30°. Find opposite
Answer: 10.4cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:12
Answer: 3:5:3 -
5. Statistics Mean
Calculate the mean of: 42, 36, 50, 35, 18, 40
Answer: 36.8