Keystones — Lintel
Five GCSE retrieval questions · 9 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
29000
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 44°. Find opposite
Answer: 9.7cm -
4. Ratio Mixed ratio problems
In ratio 4:3:3, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
Calculate the mean of: 35, 39, 25, 10, 26, 21, 9
Answer: 23.6