Keystones — Lintel
Five GCSE retrieval questions · 28 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,700,000 in standard form
Answer: 8.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.46cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5kg : 150g
Answer: 100:3 -
5. Statistics Mean
Calculate the mean of: 40, 34, 23, 34, 27, 5, 38, 31
Answer: 29