Keystones — Lintel
Five GCSE retrieval questions · 25 September 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.037
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 30°. Find opposite
Answer: 11.5cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
Calculate the mean of: 26, 13, 18, 42, 47, 41
Answer: 31.2