Keystones — Lintel
Five GCSE retrieval questions · 20 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000 in standard form
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.65cm -
4. Ratio Mixed ratio problems
£234.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £78.00 -
5. Statistics Mean
Calculate the mean of: 25, 39, 10, 49, 25, 13, 8. Give your answer to 2 decimal places
Answer: 24.14