Keystones — Lintel
Five GCSE retrieval questions · 20 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00061
Answer: 6.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 36°. Find opposite
Answer: 10.2cm -
4. Ratio Mixed ratio problems
In ratio 1:1:2, what fraction is the second part?
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 14, 7, 5, 35, 27, 31, 6, 46
Answer: 21.4