Keystones — Lintel
Five GCSE retrieval questions · 10 March 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000,000 in standard form
Answer: 3.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.99cm -
4. Ratio Mixed ratio problems
Simplify: 20:12:12
Answer: 5:3:3 -
5. Statistics Mean
Calculate the mean of: 40, 8, 36, 44, 32, 31, 45. Give your answer to 2 decimal places
Answer: 33.71