Keystones — Lintel
Five GCSE retrieval questions · 23 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00097 in standard form
Answer: 9.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 60°. Find adjacent side
Answer: 10cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 150 ml
Answer: 80:3 -
5. Statistics Mean
Calculate the mean of: 10, 12, 5, 22, 43, 14. Give your answer to 2 decimal places
Answer: 17.67