Keystones — Lintel
Five GCSE retrieval questions · 20 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 52°. Find adjacent side
Answer: 11.7cm -
4. Ratio Mixed ratio problems
In ratio 3:1:3, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 10, 17, 33, 36, 10, 6, 9, 47
Answer: 21