Keystones — Lintel
Five GCSE retrieval questions · 13 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.026
Answer: 2.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 57°. Find opposite
Answer: 43.cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
Calculate the mean of: 38, 15, 49, 43, 25, 19
Answer: 31.5