Keystones — Lintel
Five GCSE retrieval questions · 14 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.088 in standard form
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.74cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 900 ml
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 20, 21, 50, 18, 34, 24, 18, 12. Give your answer to 2 decimal places
Answer: 24.63