Keystones — Lintel
Five GCSE retrieval questions · 17 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
11000000
Answer: 1.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 47°. Find opposite
Answer: 16.cm -
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: 29, 41, 22, 35, 28, 33, 41, 47
Answer: 34.5