Keystones — Lintel
Five GCSE retrieval questions · 5 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0047
Answer: 4.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 28°. Find adjacent side
Answer: 19.4cm -
4. Ratio Mixed ratio problems
In ratio 3:1:4, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 10, 31, 29, 8, 9, 17, 48
Answer: 21.7