Keystones — Lintel
Five GCSE retrieval questions · 9 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 460,000,000 in standard form
Answer: 4.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 21.01cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 900 ml
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 7, 27, 50, 17, 22, 9
Answer: 22