Keystones — Lintel
Five GCSE retrieval questions · 3 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0073 in standard form
Answer: 7.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 20.86cm -
4. Ratio Mixed ratio problems
£225.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £125.00 -
5. Statistics Mean
Calculate the mean of: 41, 40, 47, 44, 22, 41. Give your answer to 2 decimal places
Answer: 39.17