Keystones — Lintel
Five GCSE retrieval questions · 15 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00017
Answer: 1.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 37°. Find adjacent side
Answer: 17.6cm -
4. Ratio Mixed ratio problems
In ratio 2:3:2, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 24, 45, 8, 19, 8, 35, 8, 35
Answer: 22.8