Keystones — Lintel
Five GCSE retrieval questions · 5 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.042
Answer: 4.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 64°. Find adjacent side
Answer: 10.cm -
4. Ratio Mixed ratio problems
In ratio 1:4:4, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 20, 7, 16, 15, 49, 49
Answer: 26