Keystones — Lintel
Five GCSE retrieval questions · 8 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.049
Answer: 4.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 58°. Find adjacent side
Answer: 12.2cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:8
Answer: 3:2:2 -
5. Statistics Mean
Calculate the mean of: 29, 22, 23, 33, 20, 26, 21, 7
Answer: 22.6