Keystones — Lintel
Five GCSE retrieval questions · 21 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,100,000 in standard form
Answer: 8.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 24
Answer: (x - 2)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 10.36cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 4:2:3
Answer: 96, 48 and 72 -
5. Statistics Mean
Calculate the mean of: 35, 22, 39, 32, 39, 14, 40, 25
Answer: 30.75