Keystones — Lintel
Five GCSE retrieval questions · 5 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 160,000 in standard form
Answer: 1.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.78cm -
4. Ratio Mixed ratio problems
£324.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
Calculate the mean of: 46, 36, 16, 15, 12, 50. Give your answer to 2 decimal places
Answer: 29.17