Keystones — Lintel
Five GCSE retrieval questions · 18 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 57,000,000 in standard form
Answer: 5.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 9
Answer: (x + 9)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.08cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £98.00 -
5. Statistics Mean
Calculate the mean of: 41, 44, 17, 13, 25, 35, 21, 41. Give your answer to 2 decimal places
Answer: 29.63