Keystones — Lintel
Five GCSE retrieval questions · 27 February 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00091
Answer: 9.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 28°. Find adjacent side
Answer: 22.cm -
4. Ratio Mixed ratio problems
Divide 203 in the ratio 1:4:2
Answer: 29, 116 and 58 -
5. Statistics Mean
Calculate the mean of: 39, 34, 42, 10, 42, 36
Answer: 33.8