Keystones — Lintel
Five GCSE retrieval questions · 30 March 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 640,000 in standard form
Answer: 6.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 16.64cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
Calculate the mean of: 27, 49, 20, 34, 7, 6, 41, 43. Give your answer to 2 decimal places
Answer: 28.38