Keystones — Lintel
Five GCSE retrieval questions · 18 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.003 in standard form
Answer: 3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x - 11
Answer: (x + 1)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 10.8cm -
4. Ratio Mixed ratio problems
In ratio 8:2:12, what fraction is the second part?
Answer: 1⁄11 -
5. Statistics Mean
Calculate the mean of: 50, 41, 42, 14, 11, 44, 14, 40
Answer: 32