Keystones — Lintel
Five GCSE retrieval questions · 10 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 940,000 in standard form
Answer: 9.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.76cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6kg : 600g
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 11, 14, 40, 46, 31, 46, 47, 22. Give your answer to 2 decimal places
Answer: 32.13