Keystones — Lintel
Five GCSE retrieval questions · 2 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,100,000 in standard form
Answer: 4.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 45
Answer: (x + 9)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.55cm -
4. Ratio Mixed ratio problems
In ratio 6:4:8, what fraction is the third part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 20, 35, 43, 18, 10, 19. Give your answer to 2 decimal places
Answer: 24.17