Keystones — Lintel
Five GCSE retrieval questions · 20 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000 in standard form
Answer: 1.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 26.54cm -
4. Ratio Mixed ratio problems
Black and white sweets are in the ratio 9:14. What fraction of the sweets are black?
Answer: 9⁄23 -
5. Statistics Mean
Calculate the mean of: 48, 10, 16, 50, 34, 28, 20. Give your answer to 2 decimal places
Answer: 29.43