Keystones — Lintel
Five GCSE retrieval questions · 12 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
2800000
Answer: 2.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 60°. Find opposite
Answer: 29.4cm -
4. Ratio Mixed ratio problems
In ratio 4:1:3, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 17, 36, 27, 10, 6, 26, 45
Answer: 23.9