Keystones — Lintel
Five GCSE retrieval questions · 28 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 27,000,000 in standard form
Answer: 2.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.64cm -
4. Ratio Mixed ratio problems
Simplify: 8:20:24
Answer: 2:5:6 -
5. Statistics Mean
Calculate the mean of: 28, 36, 47, 30, 24, 27, 16. Give your answer to 2 decimal places
Answer: 29.71