Keystones — Lintel
Five GCSE retrieval questions · 25 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,700,000 in standard form
Answer: 7.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 19.31cm -
4. Ratio Mixed ratio problems
Simplify: 12:10:12
Answer: 6:5:6 -
5. Statistics Mean
Calculate the mean of: 43, 26, 45, 49, 49, 18, 5, 7
Answer: 30.25