Keystones — Lintel
Five GCSE retrieval questions · 29 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0006 in standard form
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 13x + 12
Answer: (x + 12)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 300 ml
Answer: 50:3 -
5. Statistics Mean
Calculate the mean of: 19, 48, 48, 5, 20, 32, 19, 25
Answer: 27