Keystones — Lintel
Five GCSE retrieval questions · 4 August 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000052 in standard form
Answer: 5.2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.43cm -
4. Ratio Mixed ratio problems
Simplify the ratio £7 : 30p
Answer: 70:3 -
5. Statistics Mean
Calculate the mean of: 9, 43, 9, 48, 19, 27. Give your answer to 2 decimal places
Answer: 25.83