Keystones — Lintel
Five GCSE retrieval questions · 26 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000 in standard form
Answer: 9.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 21x + 108
Answer: (x - 9)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.69cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:9
Answer: 4:4:3 -
5. Statistics Mean
Calculate the mean of: 49, 10, 33, 35, 14, 27, 33, 36. Give your answer to 2 decimal places
Answer: 29.63