Keystones — Lintel
Five GCSE retrieval questions · 15 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00053 in standard form
Answer: 5.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 54
Answer: (x + 9)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.5cm -
4. Ratio Mixed ratio problems
Simplify: 9:18:15
Answer: 3:6:5 -
5. Statistics Mean
Calculate the mean of: 6, 43, 8, 7, 36, 7, 48, 34. Give your answer to 2 decimal places
Answer: 23.63