Keystones — Lintel
Five GCSE retrieval questions · 19 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 660,000,000 in standard form
Answer: 6.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 39.92cm -
4. Ratio Mixed ratio problems
Divide 133 in the ratio 2:3:2
Answer: 38, 57 and 38 -
5. Statistics Mean
Calculate the mean of: 44, 6, 33, 6, 23, 45. Give your answer to 2 decimal places
Answer: 26.17