Keystones — Lintel
Five GCSE retrieval questions · 18 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00054
Answer: 5.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 59°. Find opposite
Answer: 36.6cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 1:2:3
Answer: 16, 32 and 48 -
5. Statistics Mean
Calculate the mean of: 36, 42, 35, 27, 26, 22, 41, 46
Answer: 34.4