Keystones — Lintel
Five GCSE retrieval questions · 22 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
31000
Answer: 3.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 43°. Find opposite
Answer: 26.cm -
4. Ratio Mixed ratio problems
In ratio 1:3:3, what fraction is the second part?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 48, 38, 43, 40, 29, 36, 50, 25
Answer: 38.6