Keystones — Lintel
Five GCSE retrieval questions · 22 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.085
Answer: 8.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 42°. Find adjacent side
Answer: 27.5cm -
4. Ratio Mixed ratio problems
In ratio 1:1:3, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 47, 45, 7, 14, 17, 37, 26
Answer: 27.6