Keystones — Lintel
Five GCSE retrieval questions · 8 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0025
Answer: 2.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 46°. Find opposite
Answer: 15.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 26, 43, 31, 30, 42, 14, 46, 47
Answer: 34.9