Keystones — Lintel
Five GCSE retrieval questions · 31 August 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 48,000 in standard form
Answer: 4.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Divide 119 in the ratio 4:1:2
Answer: 68, 17 and 34 -
5. Statistics Mean
Calculate the mean of: 23, 12, 21, 23, 50, 39, 34. Give your answer to 2 decimal places
Answer: 28.86