Keystones — Lintel
Five GCSE retrieval questions · 19 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0039 in standard form
Answer: 3.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 19.27cm -
4. Ratio Mixed ratio problems
£243.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
Calculate the mean of: 21, 19, 20, 23, 27, 20, 34. Give your answer to 2 decimal places
Answer: 23.43