Keystones — Lintel
Five GCSE retrieval questions · 29 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,500,000 in standard form
Answer: 3.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.29cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £78.00 -
5. Statistics Mean
Calculate the mean of: 17, 40, 49, 5, 10, 47, 41. Give your answer to 2 decimal places
Answer: 29.86