Keystones — Lintel
Five GCSE retrieval questions · 21 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0045 in standard form
Answer: 4.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 18
Answer: (x - 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 13.33cm -
4. Ratio Mixed ratio problems
£162.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £108.00 -
5. Statistics Mean
Calculate the mean of: 16, 12, 12, 42, 25, 25, 5, 6. Give your answer to 2 decimal places
Answer: 17.88