Keystones — Lintel
Five GCSE retrieval questions · 23 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.051
Answer: 5.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 58°. Find opposite
Answer: 35.2cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 16, 9, 46, 7, 38, 17
Answer: 22.2