Keystones — Lintel
Five GCSE retrieval questions · 12 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.086
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 50°. Find opposite
Answer: 29.8cm -
4. Ratio Mixed ratio problems
In ratio 3:2:2, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 6, 9, 34, 33, 6, 21, 48
Answer: 22.4