Keystones — Lintel
Five GCSE retrieval questions · 7 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
58000000
Answer: 5.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 44°. Find opposite
Answer: 13.5cm -
4. Ratio Mixed ratio problems
In ratio 3:4:4, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 28, 27, 47, 20, 20, 13, 10, 50
Answer: 26.9