Keystones — Lintel
Five GCSE retrieval questions · 17 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
96000000
Answer: 9.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 49°. Find adjacent side
Answer: 18.4cm -
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: 46, 32, 31, 22, 6, 14, 9, 15
Answer: 21.9