Keystones — Lintel
Five GCSE retrieval questions · 24 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.068
Answer: 6.8 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 48°. Find opposite
Answer: 22.2cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 14, 39, 46, 13, 32, 30
Answer: 29