Keystones — Lintel
Five GCSE retrieval questions · 18 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
390000
Answer: 3.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 43°. Find adjacent side
Answer: 21.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 11, 36, 18, 47, 11, 31
Answer: 25.7