Keystones — Lintel
Five GCSE retrieval questions · 30 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 280,000 in standard form
Answer: 2.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 14.28cm -
4. Ratio Mixed ratio problems
Simplify: 24:12:24
Answer: 2:1:2 -
5. Statistics Mean
Calculate the mean of: 25, 20, 17, 10, 18, 8, 33, 46. Give your answer to 2 decimal places
Answer: 22.13