Keystones — Lintel
Five GCSE retrieval questions · 22 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 820,000 in standard form
Answer: 8.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 17.62cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m : 85cm
Answer: 100:17 -
5. Statistics Mean
Calculate the mean of: 10, 9, 10, 12, 32, 19, 29, 6. Give your answer to 2 decimal places
Answer: 15.88