Keystones — Lintel
Five GCSE retrieval questions · 17 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00085
Answer: 8.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 60°. Find opposite
Answer: 45cm -
4. Ratio Mixed ratio problems
In ratio 1:2:4, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 18, 42, 16, 45, 16, 25, 21
Answer: 26.1