Keystones — Lintel
Five GCSE retrieval questions · 17 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 740,000 in standard form
Answer: 7.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 17.53cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 2:1:3
Answer: 56, 28 and 84 -
5. Statistics Mean
Calculate the mean of: 35, 36, 24, 13, 36, 42, 25, 28. Give your answer to 2 decimal places
Answer: 29.88