Keystones — Lintel
Five GCSE retrieval questions · 27 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 65,000 in standard form
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 20
Answer: (x + 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 34.64cm -
4. Ratio Mixed ratio problems
In ratio 4:7:7, what fraction is the first part?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 38, 8, 33, 21, 48, 26, 36
Answer: 30