Keystones — Lintel
Five GCSE retrieval questions · 22 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 33,000,000 in standard form
Answer: 3.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 9
Answer: (x + 9)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.42cm -
4. Ratio Mixed ratio problems
£224.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £64.00 -
5. Statistics Mean
Calculate the mean of: 8, 17, 40, 47, 39, 22, 47, 11. Give your answer to 2 decimal places
Answer: 28.88