Keystones — Lintel
Five GCSE retrieval questions · 30 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 250,000 in standard form
Answer: 2.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 8.72cm -
4. Ratio Mixed ratio problems
Divide 270 in the ratio 4:3:3
Answer: 108, 81 and 81 -
5. Statistics Mean
Calculate the mean of: 37, 47, 41, 35, 36, 31, 33, 8
Answer: 33.5