Keystones — Lintel
Five GCSE retrieval questions · 14 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0021
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 53°. Find opposite
Answer: 39.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 11, 47, 6, 48, 50, 33, 23, 7
Answer: 28.1