Keystones — Lintel
Five GCSE retrieval questions · 15 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
170000
Answer: 1.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 60°. Find opposite
Answer: 41.6cm -
4. Ratio Mixed ratio problems
In ratio 2:4:4, what fraction is the second part?
Answer: 4⁄10 -
5. Statistics Mean
Calculate the mean of: 41, 25, 40, 43, 44, 8, 47, 12
Answer: 32.5