Keystones — Lintel
Five GCSE retrieval questions · 16 July 2026 · mathsvault.uk/keystones
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1. Number Converting to standard form
58000000
Answer: 5.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 53°. Find opposite
Answer: 37.2cm -
4. Ratio Mixed ratio problems
Simplify: 6:8:12
Answer: 3:4:6 -
5. Statistics Mean
Calculate the mean of: 50, 29, 9, 37, 12, 25, 39, 35
Answer: 29.5