Keystones — Lintel
Five GCSE retrieval questions · 26 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00057 in standard form
Answer: 5.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 34.64cm -
4. Ratio Mixed ratio problems
£306.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £170.00 -
5. Statistics Mean
Calculate the mean of: 39, 13, 30, 46, 41, 32
Answer: 33.5