Keystones — Lintel
Five GCSE retrieval questions · 12 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 270,000 in standard form
Answer: 2.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 7.42cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 20 minutes
Answer: 3:1 -
5. Statistics Mean
Calculate the mean of: 40, 37, 10, 36, 43, 33, 35. Give your answer to 2 decimal places
Answer: 33.43