Keystones — Lintel
Five GCSE retrieval questions · 27 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 690,000 in standard form
Answer: 6.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.76cm -
4. Ratio Mixed ratio problems
Simplify the ratio £7 : 85p
Answer: 140:17 -
5. Statistics Mean
Calculate the mean of: 19, 48, 14, 16, 33, 45, 33, 20
Answer: 28.5