Keystones — Lintel
Five GCSE retrieval questions · 28 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00027
Answer: 2.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 36°. Find opposite
Answer: 18.2cm -
4. Ratio Mixed ratio problems
In ratio 1:3:3, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 20, 36, 22, 6, 24, 32
Answer: 23.3