Keystones — Lintel
Five GCSE retrieval questions · 12 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000065 in standard form
Answer: 6.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 20.24cm -
4. Ratio Mixed ratio problems
£287.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £82.00 -
5. Statistics Mean
Calculate the mean of: 19, 45, 36, 6, 27, 27. Give your answer to 2 decimal places
Answer: 26.67