Keystones — Lintel
Five GCSE retrieval questions · 14 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 14,000,000 in standard form
Answer: 1.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 17.89cm -
4. Ratio Mixed ratio problems
Simplify: 9:9:12
Answer: 3:3:4 -
5. Statistics Mean
Calculate the mean of: 20, 17, 28, 16, 46, 36. Give your answer to 2 decimal places
Answer: 27.17