Keystones — Lintel
Five GCSE retrieval questions · 18 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,200,000 in standard form
Answer: 7.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 45°. Find opposite
Answer: 22cm -
4. Ratio Mixed ratio problems
£259.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £74.00 -
5. Statistics Mean
Calculate the mean of: 28, 28, 21, 45, 19, 23, 38. Give your answer to 2 decimal places
Answer: 28.86