Keystones — Lintel
Five GCSE retrieval questions · 18 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
7000000
Answer: 7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 55°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
In ratio 1:4:4, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 30, 9, 17, 9, 21, 21, 50
Answer: 22.4