Keystones — Lintel
Five GCSE retrieval questions · 9 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.051
Answer: 5.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 31°. Find opposite
Answer: 13.2cm -
4. Ratio Mixed ratio problems
In ratio 1:4:3, what fraction is the second part?
Answer: 4⁄8 -
5. Statistics Mean
Calculate the mean of: 19, 49, 34, 38, 7, 22
Answer: 28.2