Keystones — Lintel
Five GCSE retrieval questions · 1 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 320,000 in standard form
Answer: 3.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 44.81cm -
4. Ratio Mixed ratio problems
Divide 100 in the ratio 4:3:3
Answer: 40, 30 and 30 -
5. Statistics Mean
Calculate the mean of: 16, 15, 38, 34, 39, 7. Give your answer to 2 decimal places
Answer: 24.83