Keystones — Lintel
Five GCSE retrieval questions · 25 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 30,000,000 in standard form
Answer: 3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 27
Answer: (x + 9)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.59cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 4:3:2
Answer: 40, 30 and 20 -
5. Statistics Mean
Calculate the mean of: 22, 14, 9, 35, 8, 33. Give your answer to 2 decimal places
Answer: 20.17