Keystones — Lintel
Five GCSE retrieval questions · 15 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.059 in standard form
Answer: 5.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.94cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 400 ml
Answer: 5:1 -
5. Statistics Mean
Calculate the mean of: 46, 29, 47, 14, 17, 13, 31. Give your answer to 2 decimal places
Answer: 28.14