Keystones — Lintel
Five GCSE retrieval questions · 3 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
74000000
Answer: 7.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 45°. Find opposite
Answer: 26cm -
4. Ratio Mixed ratio problems
In ratio 2:2:1, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 39, 9, 31, 43, 20, 15, 18, 46
Answer: 27.6