Keystones — Lintel
Five GCSE retrieval questions · 8 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 11,000,000 in standard form
Answer: 1.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
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
£240.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
Calculate the mean of: 45, 27, 12, 9, 17, 18, 40, 26
Answer: 24.25