Keystones — Lintel
Five GCSE retrieval questions · 16 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.03
Answer: 3 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 52°. Find opposite
Answer: 23cm -
4. Ratio Mixed ratio problems
In ratio 3:3:2, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 31, 32, 46, 21, 28, 21, 49
Answer: 32.6