Keystones — Lintel
Five GCSE retrieval questions · 24 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 170,000,000 in standard form
Answer: 1.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 12.43cm -
4. Ratio Mixed ratio problems
Simplify the ratio 9m : 45cm
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 29, 19, 16, 19, 41, 16, 28
Answer: 24