Keystones — Lintel
Five GCSE retrieval questions · 15 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0097
Answer: 9.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 53°. Find adjacent side
Answer: 12.6cm -
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: 9, 43, 35, 34, 15, 14
Answer: 25