Keystones — Lintel
Five GCSE retrieval questions · 26 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.091 in standard form
Answer: 9.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 27
Answer: (x + 9)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.01cm -
4. Ratio Mixed ratio problems
£190.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £114.00 -
5. Statistics Mean
Calculate the mean of: 35, 6, 19, 20, 18, 8, 42. Give your answer to 2 decimal places
Answer: 21.14