Keystones — Lintel
Five GCSE retrieval questions · 25 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 540,000 in standard form
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.47cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 450g
Answer: 40:9 -
5. Statistics Mean
Calculate the mean of: 34, 47, 33, 7, 28, 46, 21. Give your answer to 2 decimal places
Answer: 30.86