Keystones — Lintel
Five GCSE retrieval questions · 21 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0084
Answer: 8.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 51°. Find opposite
Answer: 33.3cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:9
Answer: 4:2:3 -
5. Statistics Mean
Calculate the mean of: 26, 29, 47, 15, 48, 16, 38, 43
Answer: 32.8