Keystones — Lintel
Five GCSE retrieval questions · 1 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 580,000 in standard form
Answer: 5.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 4
Answer: (x + 4)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.23cm -
4. Ratio Mixed ratio problems
Divide 95 in the ratio 1:2:2
Answer: 19, 38 and 38 -
5. Statistics Mean
Calculate the mean of: 30, 28, 25, 17, 21, 40, 25. Give your answer to 2 decimal places
Answer: 26.57