Keystones — Lintel
Five GCSE retrieval questions · 24 January 2023 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0075
Answer: 7.5 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 34°. Find adjacent side
Answer: 17.4cm -
4. Ratio Mixed ratio problems
In ratio 4:4:2, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
Calculate the mean of: 25, 19, 42, 17, 19, 9
Answer: 21.8