Keystones — Lintel
Five GCSE retrieval questions · 21 October 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0025
Answer: 2.5 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 60°. Find opposite
Answer: 26cm -
4. Ratio Mixed ratio problems
In ratio 3:4:2, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 7, 10, 50, 26, 5, 37, 9, 43
Answer: 23.4