Keystones — Lintel
Five GCSE retrieval questions · 18 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 59,000 in standard form
Answer: 5.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 11.72cm -
4. Ratio Mixed ratio problems
Divide 156 in the ratio 1:3:2
Answer: 26, 78 and 52 -
5. Statistics Mean
Calculate the mean of: 7, 21, 29, 39, 25, 31, 28. Give your answer to 2 decimal places
Answer: 25.71