Keystones — Lintel
Five GCSE retrieval questions · 7 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00045 in standard form
Answer: 4.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 18
Answer: (x + 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 39.84cm -
4. Ratio Mixed ratio problems
£165.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £99.00 -
5. Statistics Mean
Calculate the mean of: 33, 29, 47, 12, 40, 26, 11, 14
Answer: 26.5