Keystones — Lintel
Five GCSE retrieval questions · 27 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
260000
Answer: 2.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 38°. Find adjacent side
Answer: 30.7cm -
4. Ratio Mixed ratio problems
In ratio 3:3:4, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
Calculate the mean of: 28, 10, 27, 25, 8, 9, 13
Answer: 17.1