Keystones — Lintel
Five GCSE retrieval questions · 23 April 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.021
Answer: 2.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 48°. Find opposite
Answer: 26.7cm -
4. Ratio Mixed ratio problems
Simplify: 6:8:12
Answer: 3:4:6 -
5. Statistics Mean
Calculate the mean of: 34, 23, 33, 30, 6, 26, 47
Answer: 28.4