Keystones — Lintel
Five GCSE retrieval questions · 3 October 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 - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 18.01cm -
4. Ratio Mixed ratio problems
Divide 48 in the ratio 2:1:1
Answer: 24, 12 and 12 -
5. Statistics Mean
Calculate the mean of: 13, 44, 45, 6, 28, 47, 6, 25
Answer: 26.75