Keystones — Lintel
Five GCSE retrieval questions · 16 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 260,000 in standard form
Answer: 2.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 49.93cm -
4. Ratio Mixed ratio problems
Simplify the ratio £9 : 10p
Answer: 90:1 -
5. Statistics Mean
Calculate the mean of: 27, 37, 7, 36, 15, 45. Give your answer to 2 decimal places
Answer: 27.83