Keystones — Lintel
Five GCSE retrieval questions · 16 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0091 in standard form
Answer: 9.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 55
Answer: (x - 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.04cm -
4. Ratio Mixed ratio problems
£296.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £111.00 -
5. Statistics Mean
Calculate the mean of: 26, 10, 17, 19, 47, 21, 33. Give your answer to 2 decimal places
Answer: 24.71