Keystones — Lintel
Five GCSE retrieval questions · 1 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00061
Answer: 6.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 46°. Find opposite
Answer: 11.4cm -
4. Ratio Mixed ratio problems
Simplify: 18:15:12
Answer: 6:5:4 -
5. Statistics Mean
Calculate the mean of: 23, 12, 14, 36, 50, 8, 8, 39
Answer: 23.8