Keystones — Lintel
Five GCSE retrieval questions · 26 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.065 in standard form
Answer: 6.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 35.79cm -
4. Ratio Mixed ratio problems
Black and white counters are in the ratio 4:2. What fraction of the counters are white?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 28, 49, 19, 13, 31, 33, 18, 41
Answer: 29