Keystones — Lintel
Five GCSE retrieval questions · 10 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 32,000 in standard form
Answer: 3.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 17.14cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 12:9:10. What fraction of the sweets are white?
Answer: 9⁄31 -
5. Statistics Mean
Calculate the mean of: 46, 36, 25, 28, 17, 37
Answer: 31.5