Keystones — Lintel
Five GCSE retrieval questions · 24 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 180,000 in standard form
Answer: 1.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.37cm -
4. Ratio Mixed ratio problems
Divide 189 in the ratio 4:3:2
Answer: 84, 63 and 42 -
5. Statistics Mean
Calculate the mean of: 18, 43, 15, 29, 36, 39, 44, 6
Answer: 28.75