Keystones — Lintel
Five GCSE retrieval questions · 2 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 41,000,000 in standard form
Answer: 4.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 19.2cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:16
Answer: 1:1:2 -
5. Statistics Mean
Calculate the mean of: 8, 32, 48, 26, 38, 5. Give your answer to 2 decimal places
Answer: 26.17