Keystones — Lintel
Five GCSE retrieval questions · 1 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0007
Answer: 7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 52°. Find opposite
Answer: 21.8cm -
4. Ratio Mixed ratio problems
In ratio 3:1:4, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
Calculate the mean of: 36, 45, 27, 6, 19, 34, 12, 25
Answer: 25.5