Keystones — Lintel
Five GCSE retrieval questions · 23 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
83000
Answer: 8.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 65°. Find adjacent side
Answer: 16.9cm -
4. Ratio Mixed ratio problems
Divide 161 in the ratio 4:2:1
Answer: 92, 46 and 23 -
5. Statistics Mean
Calculate the mean of: 6, 48, 36, 45, 46, 36
Answer: 36.2