Keystones — Lintel
Five GCSE retrieval questions · 23 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00041 in standard form
Answer: 4.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 21.cm -
4. Ratio Mixed ratio problems
Divide 184 in the ratio 1:1:2
Answer: 46, 46 and 92 -
5. Statistics Mean
Calculate the mean of: 41, 6, 43, 22, 16, 5. Give your answer to 2 decimal places
Answer: 22.17