Keystones — Lintel
Five GCSE retrieval questions · 22 March 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 500,000 in standard form
Answer: 5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.87cm -
4. Ratio Mixed ratio problems
Simplify the ratio 9m : 60cm
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 33, 20, 24, 46, 48, 12, 17. Give your answer to 2 decimal places
Answer: 28.57