Keystones — Lintel
Five GCSE retrieval questions · 7 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.089
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 53°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
Express the first part of 5:3 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 33, 39, 19, 42, 46, 46, 40, 22
Answer: 35.9