Keystones — Lintel
Five GCSE retrieval questions · 25 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0069
Answer: 6.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 36°. Find opposite
Answer: 8.7cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 7, 26, 42, 9, 41, 50
Answer: 29.2