Keystones — Lintel
Five GCSE retrieval questions · 20 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00095 in standard form
Answer: 9.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.06cm -
4. Ratio Mixed ratio problems
Divide 112 in the ratio 2:1:1
Answer: 56, 28 and 28 -
5. Statistics Mean
Calculate the mean of: 12, 14, 18, 23, 14, 44, 16. Give your answer to 2 decimal places
Answer: 20.14