Keystones — Lintel
Five GCSE retrieval questions · 16 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
1200000
Answer: 1.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 44°. Find opposite
Answer: 11.6cm -
4. Ratio Mixed ratio problems
In ratio 3:4:3, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
Calculate the mean of: 22, 23, 6, 14, 47, 49, 14, 31
Answer: 25.8