Keystones — Lintel
Five GCSE retrieval questions · 22 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 250,000 in standard form
Answer: 2.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.95cm -
4. Ratio Mixed ratio problems
Simplify the ratio £1 : 35p
Answer: 20:7 -
5. Statistics Mean
Calculate the mean of: 32, 34, 12, 33, 38, 38. Give your answer to 2 decimal places
Answer: 31.17