Keystones — Lintel
Five GCSE retrieval questions · 6 December 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
5200000
Answer: 5.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 45°. Find adjacent side
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Divide 208 in the ratio 1:2:1
Answer: 52, 104 and 52 -
5. Statistics Mean
Calculate the mean of: 42, 34, 10, 47, 19, 7, 50
Answer: 29.9