Keystones — Lintel
Five GCSE retrieval questions · 25 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0088
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 34°. Find opposite
Answer: 14.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 11, 12, 7, 14, 11, 24
Answer: 13.2