Keystones — Lintel
Five GCSE retrieval questions · 3 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 510,000 in standard form
Answer: 5.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 60
Answer: (x + 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 10.82cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 250g
Answer: 16:1 -
5. Statistics Mean
Calculate the mean of: 30, 41, 26, 24, 13, 9. Give your answer to 2 decimal places
Answer: 23.83