Keystones — Lintel
Five GCSE retrieval questions · 1 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 54,000,000 in standard form
Answer: 5.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.37cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 150 ml
Answer: 100:3 -
5. Statistics Mean
Calculate the mean of: 16, 17, 46, 46, 30, 15, 21. Give your answer to 2 decimal places
Answer: 27.29