Keystones — Lintel
Five GCSE retrieval questions · 18 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.063 in standard form
Answer: 6.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 4
Answer: (x - 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.98cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 950 ml
Answer: 80:19 -
5. Statistics Mean
Calculate the mean of: 6, 37, 23, 15, 22, 13. Give your answer to 2 decimal places
Answer: 19.33