Keystones — Lintel
Five GCSE retrieval questions · 18 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 37,000 in standard form
Answer: 3.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 17x + 72
Answer: (x + 9)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.38cm -
4. Ratio Mixed ratio problems
In ratio 1:10:3, what fraction is the second part?
Answer: 5⁄7 -
5. Statistics Mean
Calculate the mean of: 11, 35, 28, 23, 10, 15. Give your answer to 2 decimal places
Answer: 20.33