Keystones — Lintel
Five GCSE retrieval questions · 14 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.034 in standard form
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 31.cm -
4. Ratio Mixed ratio problems
In ratio 8:7:12, what fraction is the second part?
Answer: 7⁄27 -
5. Statistics Mean
Calculate the mean of: 27, 14, 38, 14, 15, 19, 6, 11
Answer: 18