Keystones — Lintel
Five GCSE retrieval questions · 23 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,600,000 in standard form
Answer: 5.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 27.61cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:4
Answer: 3:3:2 -
5. Statistics Mean
Calculate the mean of: 30, 46, 36, 19, 29, 13. Give your answer to 2 decimal places
Answer: 28.83