Keystones — Lintel
Five GCSE retrieval questions · 16 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 54,000,000 in standard form
Answer: 5.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.32cm -
4. Ratio Mixed ratio problems
£144.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £48.00 -
5. Statistics Mean
Calculate the mean of: 10, 48, 24, 43, 7, 43. Give your answer to 2 decimal places
Answer: 29.17