Keystones — Lintel
Five GCSE retrieval questions · 29 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,200,000 in standard form
Answer: 8.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.32cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 3:1:3
Answer: 90, 30 and 90 -
5. Statistics Mean
Calculate the mean of: 10, 19, 50, 12, 41, 40, 25, 15
Answer: 26.5