Keystones — Lintel
Five GCSE retrieval questions · 28 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0039
Answer: 3.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 54°. Find opposite
Answer: 30.3cm -
4. Ratio Mixed ratio problems
In ratio 4:4:2, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
Calculate the mean of: 22, 11, 35, 17, 13, 37
Answer: 22.5