Keystones — Lintel
Five GCSE retrieval questions · 3 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 83,000,000 in standard form
Answer: 8.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 30
Answer: (x + 6)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.81cm -
4. Ratio Mixed ratio problems
In ratio 9:5:4, what fraction is the third part?
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 49, 14, 5, 39, 36, 16
Answer: 26.5