Keystones — Lintel
Five GCSE retrieval questions · 21 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0091 in standard form
Answer: 9.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 45
Answer: (x + 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 21.61cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
Calculate the mean of: 36, 50, 45, 49, 20, 5. Give your answer to 2 decimal places
Answer: 34.17