Keystones — Lintel
Five GCSE retrieval questions · 27 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000056 in standard form
Answer: 5.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.62cm -
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: 49, 32, 29, 49, 20, 15. Give your answer to 2 decimal places
Answer: 32.33