Keystones — Lintel
Five GCSE retrieval questions · 16 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,200,000 in standard form
Answer: 7.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 16.86cm -
4. Ratio Mixed ratio problems
Simplify: 15:6:18
Answer: 5:2:6 -
5. Statistics Mean
Calculate the mean of: 25, 28, 7, 48, 38, 49, 14. Give your answer to 2 decimal places
Answer: 29.86