Keystones — Lintel
Five GCSE retrieval questions · 17 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,300,000 in standard form
Answer: 4.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.9cm -
4. Ratio Mixed ratio problems
£282.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £94.00 -
5. Statistics Mean
Calculate the mean of: 40, 7, 37, 5, 31, 27, 50. Give your answer to 2 decimal places
Answer: 28.14