Keystones — Lintel
Five GCSE retrieval questions · 1 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 71,000 in standard form
Answer: 7.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 60°. Find adjacent side
Answer: 18cm -
4. Ratio Mixed ratio problems
Red and blue counters are in the ratio 6:12. What fraction of the counters are blue?
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 49, 35, 49, 49, 42, 42, 44. Give your answer to 2 decimal places
Answer: 44.29