Keystones — Lintel
Five GCSE retrieval questions · 17 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0013 in standard form
Answer: 1.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 22.85cm -
4. Ratio Mixed ratio problems
£147.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
Calculate the mean of: 45, 20, 38, 40, 11, 20, 13, 34. Give your answer to 2 decimal places
Answer: 27.63