Keystones — Lintel
Five GCSE retrieval questions · 11 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00071 in standard form
Answer: 7.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.11cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £64.00 -
5. Statistics Mean
Calculate the mean of: 8, 35, 21, 24, 9, 31, 12, 5. Give your answer to 2 decimal places
Answer: 18.13