Keystones — Lintel
Five GCSE retrieval questions · 30 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00096 in standard form
Answer: 9.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 26.46cm -
4. Ratio Mixed ratio problems
Red, blue and green counters are in the ratio 10:1:12. What fraction of the counters are blue?
Answer: 1⁄23 -
5. Statistics Mean
Calculate the mean of: 9, 48, 47, 5, 48, 9, 42, 15. Give your answer to 2 decimal places
Answer: 27.88