Keystones — Lintel
Five GCSE retrieval questions · 7 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.035
Answer: 3.5 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 36°. Find adjacent side
Answer: 26.7cm -
4. Ratio Mixed ratio problems
In ratio 3:1:2, what fraction is the second part?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 28, 20, 29, 32, 47, 46, 14
Answer: 30.9