Keystones — Lintel
Five GCSE retrieval questions · 8 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0073
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 60°. Find opposite
Answer: 43.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 46, 20, 28, 31, 34, 26, 26, 17
Answer: 28.5