Keystones — Lintel
Five GCSE retrieval questions · 2 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.009 in standard form
Answer: 9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 9.44cm -
4. Ratio Mixed ratio problems
Simplify: 15:15:6
Answer: 5:5:2 -
5. Statistics Mean
Calculate the mean of: 27, 10, 24, 22, 10, 18, 35, 13. Give your answer to 2 decimal places
Answer: 19.88