Keystones — Lintel
Five GCSE retrieval questions · 13 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.057 in standard form
Answer: 5.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.06cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 400 ml
Answer: 5:1 -
5. Statistics Mean
Calculate the mean of: 18, 50, 13, 13, 12, 33, 29
Answer: 24